Stuck in a rut

Hi ladies, please no harsh comments.
Here goes, I am a single mum of 3 kids. Been single for 6 yrs, was in a very long relationship that I ended due to manipulation, control, mental & physical abuse. The kids dad has no input in their life, pays child support but never takes them for me, & kids don’t want to go with him anyways. I struggle so much, trying to work, run around with sports etc, I really don’t get a break. In a 6 years I have had a lot of hookups with men & I’ve only really had one guy I was seeing for 2 years on/off since I broke it off with my ex. I’m so sick of been on my own, I hate weekends the most because I feel your so busy working during the week & when the weekend comes I feel it’s when you go out with your family or just chill at home with the kids, but I feel so empty, Everywhere where I go everyone has their husband/partner with them, my friends are all married & on weekends are out & about doing things with their family. I don’t know I just can’t seem to get it right with men, I’ve met up with two Guys within 2 months, I was talking to one guy for about a couple of months. We texted everyday, we were exchanging pictures of each other, we finally met the other day, he told me to come to his house, we chatted & had a great time, and by that afternoon he wasn’t talking to me, he said he wasn’t interested....like what the hell.....did I just miss something here???? The other guy we texted for a few days, meet up twice had lunch both times, & then bam, NOT INTERESTED ANYMORE I just feel like such a failure here. I feel I wasted so much of my time , and get excited meeting them & turns out they dont like me anymore. My self esteem is very low, I’ve never been a confident human being. Why isn’t anyone interested in me???? I feel so ugly, worthless & im so tired of this online dating crap. Sorry for the rant....I’m so damn lonely & sad, I just want to be loved, to add to this, I feel meeting men is actually way to hard due to my circumstances of been a single mother. And these dating sites, there are only few men I do like on there & they are interested at first, but never lasts. Sick to death of sifting through so many men. Is this the world we live in now when it comes to meeting men & what you have to deal with. I just didn’t think this would be so hard to find someone nice. I feel I have nothing to look forward too anymore, just being a mum all the time.