Okay, I need honest opinions about being a mother and having a social life?

I don't mean social life as in going to parties and getting trashed..promiscuous behavior, etc. I just mean hanging out with your friends, going to movies, sporting events, etc. Like my ex has made me feel really ashamed of the way I have been acting since we've decided to separate 3 months ago and my friends are telling me I'm not doing anything but honestly, they don't have kids. So if you could please give me advice I would appreciate it. So since my husband has decided not to do joint custody until he moves into his new house I have the kids all the time (which I am more than happy with) but on Friday's I try to get out of the house to see my friends for a few hours. My mom and my sister like spending time with the kids so they'll come over and play games, cook dinner etc and everyone has a good time. Last night I just went over to my girlfriends house and had one mixed drink and came home 2 1/2 hours later. The weekend before I went out pretty late because I had made no plans and my mom thought I needed a break since school started. I mean, I'm not meeting up with guys, I'm leaving my kids with someone they love and I trust, and I'm not going out for longer than 3 hours at a time. He keeps telling me if I don't want kids to just give them to him and I can have the social life I want..do I deserve this or is it unfair? Honest opinion please.