Hm. This is a tough one, and I'm trying to put myself in the girl's position.
Okay, this is just me, and you have to remember that everyone is different, so this girl may not react in the way I do.
I'd need to be eased into things. Your first post talked about your self harm. I'd have lots of questions. Many of them difficult. What type of treatments past and present you use/d. What are some of the things you did. What drove you to it. How it made you feel when you harmed yourself. Lots of different things. The fact I had lots of questions would indicate to you that I'm interested in finding out all I can about what drives someone to self-harm. If I didn't have questions, it'd be because I'd made up my mind that your situation was one I was going to avoid. And that's probably what I'd do. Avoid you.
Then there's the alcohol problem you mentioned in a subsequent post. It sounds like you exchanged one addiction for another. Self-harm to drink. To be honest, I wouldn't want you to lay out all your demons in one discussion. Getting to know someone takes time. And while I appreciate honesty, I need time to digest things. So it would be best if you told me about one of your problems, but mentioned there are more skeletons to share but don't want to burden me all in one hit.
Obviously there are some underlying psychiatric issues that drove you to this addictive behaviour. I'd be curious about those. When I was ready, I'd probably ask you about them.
Above all else, I'd think you weren't ready for a relationship. Not a serious, physical, love type of relationship. But everyone can do with a friend. And if in the end a friend is all you get from this girl, that's still something very positive.
One other thing I'd like to mention is, be ready to hear what this girl's demons are. While you may think that they couldn't be any worse than yours, the reality is that sometimes they
can be.
I wish you the best of luck and hope things turn out the way you want them to.
