I feel like my girlfriend doesn't care as much as I do?

[Bobmarley]

I don't think girlfriend cares as much as I do about the relationship. I'm 17 and she's 15, yes I know there is a gap, but age is just a number in the end, and we both want the same thing out of life. We have been going out for 6 months now, and at the beginning of the relationship we were both so happy. But recently I have been getting sad and stressed out about everything (mainly exams) but i think it might be having an effect on our relationship. We have had a few arguments and that is good because it isn't really a great relationship if there are no arguments, but it's not that we are disagreeing with things, it's more of honesty and trusting. She lost her V at 13 (Bad, I know) and she has had sexual relationships with like 10 guys, including me. She took my V but we have only done it 3 times, everytime we get into 'a mood', we make out, but nothing ever happens, the last time we did something was like 3 months ago, and she always says she would like to do it again, but it never happens. She always changes topic too. When I have wrote her a big text for her to read in the morning she always replies with a really short answer (well, any big long text i sent her i get a text that is 1/20th of the size back). The other morning, i sent her a text saying "good morning, I love you so much, i want to be with you forever etc.", and she replies with "good morning, i need to get ready" (this is for school), and then her next text was "i have 120 followers on twitter". I mean WHAT THE ACTUAL F***?! It's like she didn't even acknowledge that i sent her a meaningful text.
I'm quite emotionally unstable to be honest, and I feel like I don't deserve her, she talks to random guys and has a lot of guy friends, she recently got this guy of twitters number, who is a random stranger who just 'happens' to like what she likes.

She does regret losing her V at that age, and wishes it was with me and only me, and she says she doesn't care about sex, but if she didn't why has she done it with that many guys at the age then?! I just don't understand it. I think i have trust issues because of facebook messages i've seen to her ex and this one other guy. where to me, it looks like she is cheating. A message to her ex was.. He said: "if i was standing naked infront of you would you have sex with me?" and her reply was yes (but this was like after a month of me going out with her) and that same month she was saying i love you to this other guy who lives like 200 miles away, and using kisses at the end of messages and talking about sex and stuff! This might be a reason why i can't trust her.. but i want to trust her, because i love her with all my heart and i want to marry her and have a family together!

I really don't know what to do to be honest, and i need help.. badly!

Please help me and if you want me to add anything else just say, that's if you can add stuff, i'm new to this.
Thank you!
By the way, she doesn't know that i've seen them messages. I can't really tell her after so long.
Do i do reverse psychology and talk to loads of girls or something? I'm not that good at talking to people though and I'm pretty lucky to have my girlfriend
I've promised so much to her, and i've given her it. She knows that I love her, and her friends know how committed she is, and her ex dumped her because she was too committed (her ex was the same age as me). We both would love the same things, but i know because of the age gap it'll be a while before anything too serious happens. I was almost on the brink of suicide before i met her and losing her would kill me inside, and maybe for real. I just hurts a lot me thinking that she'll leave me. Or cheat on me. I see her as my soul mate, and i have never connect this well to anyone before.

[Emilie]

This doesn't sound like a healthy relationship. She is too young to be as in it as you want her to be. Now is her, and your time to just date around and have fun and I think you are putting too much pressure on her and yourself. She does not sound as into your relationship as you are, and their is nothing you can do to change that. She either is or she isn't and that is up to her and her alone. It is nothing that you did wrong, that just who she is right now. The fact that she has already been with so many guys point towards sexual abuse. At some point in time she was abused sexually. That or just losing her V at 13 was enough to cause this reaction. It is easier for her to have random sex than the intimate sex that you two have, and that is probably why you don't have sex very often. I don't think she is cheating on you, but she might. She enjoys the attention that she gets from boys and because of her past experiences she is more likely to have random sex. I'm sorry but I don't think this is a relationship that you should continue. You haven't dated enough people yet to really understand that what you described above is not a good relationship. You don't have enough to compair it to yet. And you have displayed that you are not yet ready for such a serious relationship by suggesting that you might try to reverse psychology her to make her feel guilty or jealous. You should never try to manipulate the person your dating.

[?]

I been with my girlfriend for well over 17 months and Im stressed too. I think the best thing to do is to leave her and let her be free, if she doesnt want to be with me I wont force her. It will depress me, crush me, and probably lead me back to my suicide thoughts (I also had them before I met her). I just dont know too man. How about you give it another shot, give her all the love you can and be with her a lot more. Rather than having her talk to those guys online, make her look forward to a walk with you later that night. Her mind will be focused on the date, the guilt of "cheating," on you will be very high so she probably wouldnt cheat. Good-Luck.