I was in the EXACT same predicament as you, 12 years ago. I was going to college full-time, working at Kodak part-time and doing hair all day on Saturdays and along came my daughter. Her father (or, sperm donor, as he's called in our house) refused to work and help support the family...I'd come home and find him sleeping on the couch watching Nickelodeon or VH1...no, not with our daughter, but by himself because he wouldn't get up and watch the baby, much less give me an idea that he was actually taking care of her. The ONE time I had him watch her, I came home to her wailing her lungs out while he was on teh phone, smoking, on the back porch, purposely ignoring her. I had to PAY a babysitter to take care of her while he slept the day away. Then the final straw, he was in the basement on the phone with an old girlfriend of his, telling her how much he missed her. Was I eavesdropping...no...unbeknownst to him, when he talked in the basement, his voice carries throughout the house through the heat ducts like a PA system. To add insult to injury, we rented our house from his mother and one day while at the Salon doing my aunt's hair, his mother called me and demanded rent payment or she'd 'rent it to someone that could afford the rent." Once I stopped crying, my aunt invited me to move in with her and my grandmother with my daughter. I accepted and never looked back. I stayed at my gramma's until I graduated from college and could support myself with my daughter. Now, my daughter is in Junior High, is in marching band and choir and on high honor roll. And I'm married to my awesome husband and a stay-at-home mom to both my daughter and my almost 6-year-old son.
My point of my story is...it looks bleak and dismall now, but find someone you can stay with, cut cord and move on to better things. The sooner the better because the older your daughter gets, the more she'll feel torn from the dad...assuming she's close with him at all. I left when my daughter was 6 months old. I barely remember living with 'the donor', much less her remembering any of it. Makign the move is the hardest part...patching up your life and moving on is exhilarating and liberating and you will NEVER regret your move from a loser like him. If he were a good dad and you just didn't get along with him, I wouldn't be sayign these things...but he belongs in the same loser category as my daughter's father and he'll only drag, not only YOU down, but also your daughter.
Here's the downside...if he's dishing out child support, he'll likely be looking for some sort of visitation. You need to print out all you can of him soliciting minors for sex. Its the only chance you have of negating his right to visitation. YOU would have to be a total jerk for the courts to award him custody. But its very hard to delete his right to visit his daughter. They even go so far as to make the mother out to be the bad guy in this situation, as if to say, 'how dare you try to take away his right to visitation." Here's the good news. Leave. If he takes you to court for visitation, you have the right to a court appointed (and paid for) attorney, if you're unemployed. A court appointed attorney is willing to go vast distances with you to get you your wishes granted. If you end up paying for your attorney, they will nudge you to settle through mediation and have you coughing up your daughter to this sicko for weekends. I guarantee he won't take care of her while he has her and GOD KNOWS who he'll be exposing her to while he has her. Some creepy non-custodial parents tend to use their kids as possesions or pawns or even bait for potential girlfriends. Something like taking a cute dog for a walk, scores of girls come up to a guy and want to pet the dog...same goes for a guy with a cute baby in a stroller. Then in seconds, he'll be singing about how you left him and he only gets to see her on weekends...and blah, blah, blah. He's gross, I can tell. Get out now before bad things happen to you and/or your daughter.
Just my 2 1/2 to 3 cents worth. Good luck to you. MOVE OUT!! I did it, you can, too!! And before you know it, your little girl will be in marching band and on high honor roll in junior high school and this section of your life will be a distant memory just like it is for me now.
First and foremost...get some dirt on him off the internet. Then find a good friend or relative and GET OUTTA THERE!! You have all our permission to do so...