How to deal with jealousy?

I'm in love with my roommate and he knows it, he tries to be understanding. I don't feel jealous at all when he goes somewhere to have sex only when he brings someone home. I can't control it, I get overwhelmed and I don't like the feeling. I can't move out, no money, stuck for at least 4 months.I try to go out when he brings someone but I don't have much money and I need money for transit or eating out. I don't want to date anyone for now. Any ideas how to deal with jealousy?