Does she like me/want me?

Hi, I have a female house mate. She is really cute and we get along with each other well. Great personality. I have always kept my distance since she has a boyfriend. I also date and see other women pretty regularly. Anyways, for some reason, every night when she takes a shower, she closes the door so that it is almost shut. I tried this out and it either wants to push open or latch closed so that means that every night she somehow balances it perfectly so that it is obviously not latched closed. Why doesnt she just close and lock the door? Im sure if something as much as brushed passed the bathroom door it would pop open and since we have clear glass shower doors you would see everything. Also, when I am watching TV and it is something that interests her she plops down on the couch so we are in full side to side contact. She could sit anywhere else, like the other couch or the recliner but she has to sit touching me. The last thing is whenever she shows me something and I need to look over she shoulder to see she presses her body back into mine. I do enjoy her company and her physical contact but I feel guilty because she has a boyfriend. Also I notice that she doesnt do it unless we are alone togther. Do you think she is into me? Or is this just subconcious? She isnt the type to tease a guy.