Dating as a single mom

ab
I've started dating again, but I've been so discouraged at how it's been. I only seem to attarct the type of men I don't want around my daughter, for example uneducated, drinking and partying a lot.. Don't care about the future etc. It makes me feel like I give off a bad impression of myself? I'm going to school for a bachelors in science hopefully to get into dental school but no educated man wants nothing with me :/ 
Is dating as a single mom usually hard? Does having a child usually scare the good men away? I've been starting to think I'm destined to be alone forever LOL also do you have any advice for dating as a single mom?