You can gather some courage and tell him face to face or you can text him about it. If you guys are still friends, then it would be easier as you can make it look like a joke just to find out what he thinks about it.
just cuz he talks with another woman doesnt mean that he is in a relation ship with them. hell i have many female friends but there is only 1 girl in my life that i love. the only way that you will know if he still loves you is if you tell him that you still love him.
I just don't get it, what's wrong with talking to other girls or guys? Being committed or "dating" doesn't put people in no-talk jail. Really....??? Let it go, you're young, date lots of people. Talk to anyone you want to, and let your friends have the same freedom until talking causes pregnancy.