Helpppp

Would it be okay if your in a relationship and you go and hang out with other guys just the two of you? I'm so confused. I've been with my boyfriend for so long and I've never done that. Yes he has cheated on me already and has messed up in the past and he has had the chance to meet girls but I'm just not like that. We recently broke up and got back together and everyone tells me that he doesn't deserve me to respect him after everything that he's done to me but idk I find that wrong. I'm just not like that. I'd be mad if he would hang out with another girl that's not me because I don't trust him like that yet. He's messed up si many times that he has to earn my trust all over again. They want me to go out and meet guys and hang out with them whenever they ask but I find that wrong. Idk I feel like I'm too loyal sometimes so idk what is wrong and what is right ☹️ any advice ?