My ex-girlfriend has a new boyfriend, I'm jealous

Ughhh I'm so jealous and I dont like it. I say I dont like caring for her but I do. I dont have a single ex girlfriend that has a new boyfriend except my sister. I've been acting out so much recently and I think it's because of this. I've never been jealous like this before. I dont say anything to her because she thinks I dont care but I do. I can talk to her and try to get her back, I think. We only broke up a few weeks ago. I dont like feeling jealous and I dont like that I dont like it and I cant do anything about it.<br><br>So my sister is mine because what's hers is mine. I feel like my ex used to be mine but however isn't anymore. I've been acting out and I can talk to her about it but I dont want to. Really I can do anything I want and that includes getting her back if she wants. And I think she only broke up with me to avoid conflict. But I dont know what I can/should do.<br><br>Ughhh I can talk to my sister about it but she can't help me. She says I can put myself out there and maybe find someone else that I'm attracted to and get together with them but I cant. I've been in relationships and I know that they dont work out or I can cheat on them and not want to fuck them. It seems really easy for other people. That's probably just what can happen though<br><br>Ughhh I dont know what I should do I can do anything and can talk to her about it and not. I can go put myself out there and find someone else and just cheat on them. Or I can get obsessed with my sister or something. Really my options are endless but I have to choose one