Love Triangle

I get what's bothering you. It's complicated. On the one hand you don't feel right taking a guy away from another woman who still loves him. On this point, you must remind yourself that you didn't take him. He ended the other relationship before he met you. You are a very good and caring person and it is commendable that you are so sensitive to his ex-girlfriend's pain. Regarding this problem, I think you need to tell your boyfriend what you heard from your best friend. Specifically, tell him that you know he broke up with his ex to protect her from having to live with a long-distance relationship. Then you coiuld tell him that you heard that she's still crying over him, meaning that his plan to protect her didn't work! This being said, you might ask him if his knowing how she feels might make him want to return to her. If he says no, he finished with her, then you can rest assured that he is truly free and clear. He's in the relationship of his choosing.

Regarding the second fear that he will drop you when you move away. This must be discussed right away. You will need to tell him that you are worried that he's going to do the same thing he did with this ex. You might then tell him that it is not healthy for him to make a one-sided decision based on what he thinks is good for someone else. It's for the other person to say what's good for her. In your case, you don't want him "protecting" you in this way. You'd rather keep the long distance relationship because you care for him. The real question is whether he is willing to keep the long distance relationship. It's very possible he cannot stand this kind of situation. Rather than admit this to himself, he fools himself into thinking he's doing something heroic for the other person. I would lay this all out and find out where he stands on this question of long distance relationships. I would again remind him that you don't want him deciding what's best for you.

Regarding the last point; that you think he'll find someone better than you. This is a sign that your self-esteem isn't as good as it should be. That's something only you can work on, ideally in therapy. I know already what a wonderful person you are. Now you need to catch up to the truth! Let me know what happens.