Whatever you decide (like all of the other said) let it be your decision, not anyone else's. Don't do anything because you are afraid your boyfriend will get mad if you don't, or because you want to make him happy. This is about you and your pregnancy. He obviously isn't a real man and if you do have the baby you will most likely be on your own.
Some people who have abortions later regret it, but a lot of others don't. Actually, to be honest more people don't regret it than do. But, that is something only you know. Even if someone else regretted their decision, that doesn't mean you will, or vice versal. Only you can know that.
If you don't want to have an abortion then don't. You don't need to go on assistance either, because you can collect child support from him. If he up and runs away and you can't afford it then go on assistance, that is why it is there.
Just make sure that when you make your decision, it isn't influenced by anyone else! Not your boyfriend, parents, friends, or even these posts. Make the decision for you. Good luck hun.