Why is my ex boyfriend acting like this?

[458]

So a couple of days ago I went to my ex bf's lacrosse game with another guy. The next day I saw a picture on my ex's instagram (we don't follow each other though) and it was a picture of him "smiling" and his caption was "smiling because i don't let NO b*tch bring me down!!"
I am pretty sure its about me, but i don't know why..I didn't do anything wrong. Even at school we will bump into each other but he will purposely ignore me. I don't know why he's acting so cold, when he broke up with me?
he broke up with me almost like 3 weeks ago now

[Don p 4people]

You have no clue as to why he did this,just to add fuel to the flame,he had no right to say horrible things about you nor calling you the "b" word,he was way out of line.this may be the reason,you can honestly call him an x.move on with your young storied life.Don't let jerks fuel your lighter.

[Craig]

He is cruel

[P]

Maybe there is a chance it's about something else. But sometimes a guy will do this for attention or to make himself feel better. Maybe e wants you to talk about it with him. It was really not the right thing to do no matter what even if you broke up with him unless you were a horrible person. If you went with your friend and he's a guy then maybe he thought you moved on way to quick, maybe he broke up with you because he felt like you did something wrong or he heard a rumor. Either way unless you should because it's the right thing because you were morally wrong, don't apologize for being a bitch, even if you want him back, move on, at least in the sense where you give him time to himself and you work on improving yourself. If he really wants you back he Should pursue you I think. I hope I helped and that this runs out well. Your not a B*** so ignore him... Good luck and thanks for answering mine!

[anonymous]

He's probably jealous about the other guy..

[Kairi]

Definitely jealous

[Jared]

He is most likely jealous of you being with another guy