Yes, you are wrong. You, for some reason, don't have confidence in yourself that you will ever meet and marry a man who will have a strong love for you and want to share a family with you. I dont' know why that is, do you?
You want a baby so badly and yet you're thinking about it as if it were some extended babysitting job that you will enjoy and will bring you all sorts of benefits.
Your statement that you would never go after him for child support is so completely whacked out that I have to make this important point, since you have missed it: the child support is about the child, not you. And not about your treatment of the guy who knocks you up. The child is the one who gets the child support and trust me, if you have the neurons to be in college, you will understand that in the grand scheme of things, you need money to raise a child. Are you thinking your mom and dad will bail you out? They won't. It is a lifelong commitment and there will be heartache for them knowing how simplistically you approached a major life-altering decision thinking they would fund your baby dreams.
If you want something to remember your ex by, have a really good portrait photo taken in a good studio and have it framed. It will also last a lifetime.
Your feelings have spilled over into dangerous, dangerous territory - almost like 'Fatal Attraction'- type craziness! That's what you and anyone who has sexual contact with you should be worrying about.
You are in college and they have counseling for students. Why not give that counseling service a try. It's obvious - to me, at least - that if you were having a better experience with the social life at college (i.e, dating, meeting new guys), this whole idea of yours would never have developed. But no matter what the reason, it's still a psychotic solution to simply missing an old boyfriend!