I'm insecure about several things, but the biggest insecurity I have by far is being in a relationship. I've been cheated on before, so now I'm always scared they're going to leave or cheat. I'm fine when I'm with current boyfriend, but when I'm not with him, I start to get paranoid and start coming up with all kinds of possible scenarios of what he could be doing at that moment. My anxiety rises. I can't eat or concentrate at work. I started chain smoking too. I even get scared when I'm not in the same room with him and I start wondering if he's chatting with another girl or something. I've lost 10 pounds already since I've started seeing him because of this. If I'm not careful, I could even lose my job, which I really hope does not happen. He's a great guy and I just want the insecurities to go away. Not only for the sake of the relationship, but for my sake.