Hi there. Reading your post I immediately can see that your girlfriend is controlling you and not allowing you to express who you really are. Don't waste your time in a relationship that does not make your happy. The differences between you are like a wedge which will only grow larger and you will resent her control - infact I think you already do which is why anxiety/depression is returning. She has ruthlessly dropped you once before and now has reeled you in again in what sounds like a power move brought on by jealousy of seeing you with another girl. Harsh as it may sound - call it quitts and move on to another relationship. From what you say ((I met someone else, after dating this girl a picture of us appeared on facebook)) it doesn't sound like your going to be alone for very long. Have a positive attitude - accept that things have changed and look positively to the future. Nothing wrong with being single and dating for a while anyway. Have fun