just found out my best friend is gay through twitter- why didn't she tell me?

[scruffy 14 year old]

me and my best friend (we are both girls, she is a year older) have known each otherfor 5 years, and i thought we knew pretty much everything about each other. i was just browsing through twitter earlier (which we both use, me considerably more than her) and noticed she had a lot of tweets about liking girls and retweets from gay/lesbian organisations and at one point she actually said 'i am gay'.
i had absolutely no idea. literally, i almost didn't believe it at first- i thought i was looking at the wrong person's page. we were talking about boys we liked at school just the other the day- does that mean she was lying? i would feel awful if i was making her feel awkward, but then again it cant be my fault if i didn't know. i just dont understand why she hasn't told me- looking back through her twitter she was talking about things like this for a really long time. i dont think she is worried as my other best friend (a boy) is openly gay and i have absolutely no problem with it in the slightest, and she knows that. i suppose maybe she just didn't want to tell me yet, but i'm not sure why. i don't know how to confront her about it, as maybe she doesnt want me to know yet. but, she is also making it pretty obvious on twitter so she obviously isn't embarrassed etc and she knows i look on the site regularly. what should i do?
@ Emma
what is?
guessing first deleted answer was a troll... ignore my first comment

I didn't think it was weird to look at what your friends were saying on twitter.
I was just wondering if I should talk to her about it.
(by the way- i have ASD (if you dont know what that is- look it up) so i find this situation very difficult)

[Alice]

You should chill. It is her prerogative to tell you in her own good time. It is not yours to "confront" her, or any such thing.

You also might want to stop stalking her Twitter posts.

ADS: Autism Spectrum Disorder(Asperger's?) So, that is why you had to ask, and why we are telling you to let it go and be a friend. She will tell you if and when she wants to. Don't feel you have to talk about everything or know everything.

[Amy]

Hmm, could it have been hacked? Or are you 100% sure it was her?
Xx

[Jon]

Okay, think back for a second. At what point have you ever said, "Hey, did you know I'm straight?" Have you ever announced it at all? No? Then why should she have to? If you have never directly asked, then it makes sense that you don't know. No need to get all upset just because you don't know her as well as you thought. Perhaps you should try asking her about her life more, instead of the things you usually talk about.

[anon]

It's kind of scary to tell someone in person that you care about that you're gay no matter how accepting they may be. at least for me it evokes perhaps irrational fears of them treating you differently or that they won't want to be your friend. It'll probably even seem stupid to me once i get it over with.

You shouldn't ask Jon. It's terrifying.

[Master_Onion]

You have to see it from her point of view. Its one thing to be open about who you are online, but another to be open face to face. When I was coming to terms with my sexuality being open online really helped me before I could be open face to face, its kinda like a warm up, warming up to stop hiding. Don't blame her about lying if she is gay, I used to lie all the time about girls I fancied, but I was gay. The thing is that for some/most being gay is something you hide and repress in your younger years, therefore for me when I talked about people I fancied, I knew I was lying, but I didn't see it as that, it was just something I HAD to do and that was it. If she is gay, you should try to tell her in some way that you don't mind, maybe bring the marriage equality debate up in conversation and voice your support. Little things will really help her confidence and in time she will tell you I'm sure, but for now she has to become comfortable with herself. There is a saying that you need to come out to yourself before others, its very true, and often very hard. Don't rush her, give her time, but be supportive or comment on twitter and how you have seen her page, hint that you know but don't just ask straight up.

[Wahoo]

Coming out is really hard especially to your friends and family so just give her some time, imagine how hard it is for her and just let it go. She will tell you when she feels like the time is right.