I don't know what to do? I'm back with my ex?

So I broke up with my boyfriend of six months almost a year ago and I still can't get him out of my head. We've been talking lately and he is being as sweet and charming as possible. So I definitely fell hard for him again. We both decided to give it another go. I'm happy half the time and the other half I worry and feel guilty because we kinda rushed into some things and my mom doesn't trust me or him as well as she did. I think I'm finally allowed to see him again but I haven't asked. She has no clue were back together. Some people are gonna be really disappointed for me going out with him and I don't know who to please. Me or them? What should I do? End it with him or stay with him and risk there disappointment in me?