Hey, It's ok that you want to tell him these things, it's because you trust him. trust is ok, and he seems to understand you, I wouldn't be worried about him leaving. I was raped once by my ex boyfriend and I told my boyfriend now and he's still here, of course it made him upset about it and assured me I was safe with him. Not all guys are the same, telling him is taking a chance but if you honestly and truly trust and like him, then it's all about taking chances. Has he opened up to you? I'm sure there are a few things that he wants to share and is scared to for the same reason. Just relax, wait to tell him if it's more comfortable for you, when you really have a good sense of how the relationship is. I don't think you're unbalanced, i think you just trust him and you want him to know your past, but be careful not to live in it. Some things just don't need to be relived. Good luck and don't stress