<human>: Can you summarize the given text in a few sentences?

I started hanging out with this girl. I know we were attracted to each other the moment we saw each other. Well, I know I was at least. I suspect she was. We hung out for a while but she had a boyfriend. They broke up and now she's looking to get out of the lease she has with her boyfriend and become my roommate. When it was all settled that we were both single we ended up sleeping together a couple of times. 

I don't think we are relationship material because or views on things are way different. I am attracted to her physically, but not as much sexually if that makes sense. This could be because I'm not quite ready or just that I don't feel any chemistry in that department. We are both in screwed up living situations so getting a place together would be great. Does sex ruin this venture, or is it possible to move past it and be roommates?  

I realize talking to her about it is vital and will happen, but I wanted to see if anyone has gone through something similar and/or had any advice on the situation.
<bot>: If sex has happened is it too late to set boundaries and maintain a friendship/roommate situation (if being roommates hasn't happened yet)?