So I've started hanging out with the friend of a friend, and - I think - he's into me at least sexually (he constantly talks to me about sex and has mentioned how important sex is to him multiple times and is always eager to come over and seeks out physical contact). BUT I always keep my guard up around him and keep my distance, because once I start having a regular physical relationship with someone, I start to get emotionally attached as well. And that wouldn't be a good idea probably, because he has a very strange relationship with his roommate. His (28m) roommate (22f) "basically lives on my bed", they have sex sometimes but he considers them "sexually incompatible" and complains about "having a terrible sex life", yet she constantly "requires" his attention and "love" (his words), even though they're "not in a relationship" and she apparently has had sex with somebody else recently. Like when he was over