Life sucks

I know my personal problems is not suppose to be put on here but I just needed to vent. I'm so unhappy in life and I guess I suppose to be happy and thankful I'm living but sometimes I wish I was not here. My life is so stressful I push so hard to keep a roof over my kids heads and food on the tv and all I get is a headache. I cant even relax after having a hard day at work. I dont have no support at all. My kids are so disrespectful. I have two boys one think he grown and the other one is working and dont even ask me mom here is money for gas for taking me back n forth instead he sends all his money to a bold head girl that havent didnt nothing but causes nothing but problems in his life and using him. How come you raised your kids so good for them to turn out to be selfish. I'm tired I just want to ran away.