Full time mom with no friends!!!

Did anyone get married, had kids and stopped talking to friends. I am 26 and a mom of 3 and I have no friends. Idk if it's hard for me to make friends it's just with school and housework it's really hard to keep up with friends. There's times when I would like to go out with girlfriends or invite them over for coffee or lunch but I don't seem to have anyone interested in hanging out. I mean I don't go out clubbing or anything, is that maybe why. Does anyone have any recommendations as to how to make friends with other moms and not look like a creep??