Bitter

I need to know how I'm going to stop myself from being bitter and jealous of like everyone in relationships. With my relationship being in a down point I feel content kind of with how things are between us. But I'm still not a girlfriend anymore like that's crappy. I just know how I am and I'm going to be a bitch I already know it. I already feel like I don't want to deal with my friends in relationships. Honestly being on here is slightly starting to be irritating. I just don't know how I'm going to deal with all this time of being single and sad and miserable and how I'm not going to take it out on everyone else?