Why did he say he likes me then cheat?

[lisa]

I have not spoken to my ex-boyfriend since he went to his ex girlfriends party in August. There has also been rumors that his ex girlfriend has stayed over He also said I was boring, awkward and hard to talk to. I found out she stayed over from my friend who she spoke to and she also said to my friend that his mum did not like me and that I was rude. She also said she f****** hates me. His ex girlfriend also said his mum told her I was rude and didn't like me and that his family love her. Today it was the last day of high school forever and I was waiting in the line to sign off my sheet and I felt like I was being judged by what I wear and my social status. All the popular people are in groups and there is just me with a small group. My ex was there and I felt sad because that is what could have been and he is blaming me for cheating which makes me feel insecure. He also told my friend I was boring,awkward and hard to talk to, after I found out he was seeing her. Whenever I want to look at him or his presence is close I think of what could have been. Even now I am still hurt he would give up so easy and not even care about telling me. He made me believe what we had was real and I was under that impression since he liked me first and initiated the relationship. Ever since we were dating she befriended my friends and invited them to her parties but now they no longer get invites (ever since me and him broke up in August). I find that odd too. He said a month ago I am boring, awkward and hard to talk to, after he found out I knew he was cheating on me. I feel like if I wasn't so naive and stupid I would have stopped our relationship from being what it was. Just yesterday the ex girlfriend's friend unfriended me on Facebook which reminds me of when I was getting evil looks from her friends.

[Liamrob]

Your better than all of them....go forward...not back.....enjoy...Your life...just starting...what makes you...happy...nothing else...

[Andrew]

Because that guy did not have your heart in mind all that was on his mind was sex at least that was the conclusion i came up with for my ex girlfriend she even had the balls to ask befor hand she also called me bored and hard to talk to but i understand that i am because i am shy and dont talk much so i dont got many friends and its been two years since someone gave me a chance

[Elise]

I hate people like that.
Seriously, you don't need any of them. It was your last day of high school so now u dont have to see any of them again. They're childish.
Just keep in touch with your friends and let all of them go. You're too mature for any of this.