Hi there,
I'm so sorry to hear about your boyfriend. This is a good safe place to find sound advice. I would say that you may like some of what you hear and may hate others of it, but for the most part its truth and its wisdom. Listen and learn. Read the sticky's at the top.
My personal opinion, (take it/leave it) the bad news is that someone you love is using, that your heart is broken, and that you are distraught. The great news is you're young, you've only invested 8 months into the relationship (I say 'only' just because there are men and women who have given almost half their lives to the hope that their loved one would change), you don't have children (this drastically complicates things) and you are SEEKING help for YOU. This is good.
More will be along shortly with better words than I. Hang in there,
Hugs.