I'm sorry Desi.
I would love to know what to say to make the pain go away.
Have you tried talking to him? Maybe he just has something on his mind.

He flirted with his ex in front of me and ignored me.

Ouch! That's not good.
So it wasn't just to try to make you jealous?

Me and his ex talked like he wanted to[he forced me to] and I don't know why he is ignoring me. If he is trying to make me jealous well it worked as did breaking my heart to. my friend who is like a brother to him and me wants me to save my relationship but I don't even know if I want to save it because he is being very immature and rude.