Vent: Dating as a single mom

So I realized that a lot of the reason why I have put up with my "situation" is because of how hard it is to date as a single parent...who works full time...and goes to school full time...is active in her kids' academic lives. I remember how tough that was finding someone who was ok with my lack of availability and that I was able to connect with. I know he's not the only fishy in the sea and there are others but it makes me just want to give it up man. He's such a jerk. Tonight he texted me that he wants to have sex and I just didn't even respond to that 😢. I haven't been so sad since my divorce over 8 years ago. I kind of wonder what I've done and I'm reflecting really hard right now- what really horrible thing have I done in my life, to not have a happy ending in my love life already? I must have...I really believe in karma...