I sincerly need help.

I have guy issues, and am desperate need of advice. The first guy I ever dated we never talked, the second I thought was nice, but he was mean to all my friends. Now I'm dating my best friend's brother. He uses his sister's user on here.:) The last time we talked was 5 days ago, and I'm freaking out! I'm trying not too, but he always messages me, a least with an update.
HELP!