reaching the limit

Have you ever come to the point in a relationship that you don't know how much more you can take? I am reaching that point with my man and yes I have kids with him and honestly that is the only thing keeping me here I don't want to take the kids away from him but should he really be out with his friends almost every night? Is that me being unreasonable even unfair? I feel big changes coming in my life and everyone knows how much I love change (she says sarcastically).  I am afraid that I wouldn't be able to give the kids everything they need if I go out on my own, afraid that if I go I will land flat on my face.  I don't want to move in with my mother but that's the only place I would be able to go to start out.  And I don't want to never see my kids because I have to work all the time to make ends meet.  So I could stay for another year or so until my youngest starts preschool or I leave after little man gets out of school at the end of the month. Or I just live like this feeling like the town pariah because everyone knows he prefers to be down at the bar than at home with me and the kids.  I feel like the next few days are really going to tell me what I should do.  Meanwhile I have been applying for jobs in the area near my moms house and looking into getting a continuing education certificate in business management.  Its a lot to take in all at once I just don't know what to do.