<p>But what do I do if it's happening after the fact?</p>
<p>My present boyfriend is moving into a house with friends soon. My boyfriend is not friends with my ex, but his present roommate/future housemate is (small school problems). And I just found out that this guy invited my ex to move into the last open spot in their house and my ex accepted.</p>
<p>My boyfriend and I both feel really weird about this. It was a somewhat long term relationship that ended about a year ago, and since I was the one who ended it for a while my ex was really sensitive if I was at all friendly to other guys when he was around. My ex and I are on decent terms now and he's been with other girls, but I honestly have no idea how to deal with this. My boyfriend and I both think its pretty weird but I don't know, maybe we're overreacting. Anyone ever been in this situation? It's bizarre. Thanks.</p>