[Coffee.]

I think you may want to suggest that he talks to her about it. You two need to both figure out what exactly she doesn't like about you. If it's something that you two are doing, maybe it's something you can fix. But it may be that she generally doesn't like another person taking up his time, and that's not fair to you or him. He's 25, and has the right to date whoever he wants, and you do not deserve hate because you're the "other person." But you won't know the reasons unless he asks. I'd suggest you do it, but I feel it might be better if they just talk. He can also clarify what she meant by her statement and how you two can move forward with you staying over. Good luck. <3