if you didn't feel that you were out of place then i'd slap your head. if i were in your shoes, i would also wonder why she hasn't found another place or atleast moved out of her ex's place.
recently my co worker broke up her relationship with her bf but being that she had just moved out here, it was really hard to find a new place. she knew that she didn't want to stay with her ex because althought they were on good terms, they no longer wanted to be together. i do believe that ex's can be good friends, and maybe even live together at a time or another, but after a relationship has ended, i don't believe they should be living together
it would totally put you in a werid situation with the ex always being around and it's like your on his territory with his ex and his house. if you think that you're really serious about this girl that you should say something. if you remain silent then she will think that either you don't care, or the situation doesn't bother you at all. maybe you two could go looking for a place together or if she can't afford it, then maybe she could live with you. if the two of you really want things to hapen, then make it happen, and it will. raverboy
...this is just my perspective on the situation...