Break up. Ex & his current gf.?

[Megan]

Hello! I just has a break up with my ex bf 4-5days ago. We've been together for nearly 22months. FYI- he cheated on me Before. & I forgave him.
2012:
My best friend tgt w me would hang out w my ex & a few other of his friends from his class- consists of 2 girls & a few other guys. Everytime I sit with them; I don't know why there seemed to be this kind of 'electric spark thingy' btwn my ex & one of those girls sitting with us. (Let's call her girl A)
OCT'12;my ex asked to be single for awhile. He gave me an acceptable reason. 12 days ltr we got back tgt.
one day; I realise his twitter pw was Girl A's b'day. I felt really hurt but I acted fine. Once, we met up & I realise his wallpaper was girl A's pic & his hp pw was also her b'day. When I qn him; he avoided. Not long, he had to leave for a school trip to china. ( Girl A was going too. ) He came back a total diff person. I would only receive 3 texts from him in a day & that's abnormal.
On the day of the break up; My best friend made a trip to my hse & told me my ex confessed to her that he likes Girl A since mar, & had 0 feelings for me. He said when he was on th sch trip; I Nv came across his mind. And when they were at china; Both of them confessed to each other... Reason why he patched w me the last time was because he felt guilty.
I feel betrayed. Hurt. Frustrated. Jealous. I committed alot to this r/s.. On top of that, he mentioned alot abt th future & he really cared.. Girl A used to be my rly good friend. She always ask us to last long but I never expected she would fall for him.. I broke w him instantly. & all he cared was if I blame girl A for it. & he said it wasn't her fault but she kept blaming herself.
In a mth, sch will start & I would be in th same class as my ex and Girl A. I'm really scared. Idk how to act in front of them in sch. I v much dont wanna go to sch a pesimmistic girl but rather an optimistic Girl. I rly appreciate u guys reading my 'story' & hope to receive some advice? thanks!<3

[never gonna no]

stir shit up be smart about it though with out looking like you breaking them up i done it before though he had no idea i knew bout his gf let call him A i got the info from someone else so when i was around him let call A's new girlfriend D wen i was around him i was talking to him then i said to my friend omg you no my friend D which she anit really my friend i dont no her i just pretended i said i was walking home when i saw D kiss let call this person B which is her ex i said i saw D kiss B i think there going back out u no i cant believe it A believed it and broke up with D now he likes me instead see my triicks work because i do it slyly.

[Silver]

Okay first of all i feel for you.. Cheating is the worst break up ever. But he will regret it to lose an amazing girl like you. I keep a journal where i write my feelings out everyday and it helps .. U should do the same.. Go out with ur friends and do everything u can possibly do to get over him. B/c YOU WILLL get over him even if it feels like u wont u will get over him and u will be happier and ull find someone who will never ever cheat on u or think about hurting u. And as for the class dnt act like it bothera u even if ita killing u inside. Dress up loook hot be happy and cheerful. An tlk to other people esp boys.. Goodluck