Not telling the baby's father that I'm pregnant?

I am currently 5 weeks along and I'm in a rock and a hard place. Earlier this year I met what I thought was this great guy. We seemed to click naturally and even though it was more casual there was chemistry. I stupidly fell in love with him. My dad warned me not to let him take advantage of me and my mom was hesitant about him. He's got a good job and a house of his own he just moved into. What eventually got me to snap was when I asked him if he wanted to do something for his birthday either this Thursday or Monday ( He's turning 28 this Friday). He responded saying he's getting hammered tomorrow and Monday he's recouperating. I know we aren't official or anything but I felt incredibly hurt he couldn't make even an hour for me. That was before I knew I was even pregnant. Keeping in mind if I knew who he truly was I would have never gotten involved with him. I have been feeling funny recently and felt I should take a test. All three came back positive and they were different brands. The thing I'm having a hard time is this guy didn't even want to hang out with me much less be with me. Should I still tell him about my baby? I had a dead beat dad and it really affected me growing up so that's why I don't want to subject my child the same way. If you were in my position would you still tell the father?