I'm upset none of my friends have been talking to me
Have you asked them why yet?
I only talked to them when they needed me
You should tell them how you are feeling. It is okay to experience some emotions when you feel like your friends are ignoring you.
Feelings are for chums, I'll get over it.
It's perfectly normal to feel hurt when people close to you are not treating you well. But I think it's more unhealthy to bottle things up like that. Why not build up the courage to ask them why, maybe it's for a simple reason.