Just tell him you have been thinking about family and how nice it would be to start one together. Bring it on slowly, and just see what his reaction is. If he seems really into it then you two should try to plan it out. If he doesnt seem really into it, then maybe you should find someone who is, and not try to force him into something he isnt happy with.
Wanting something and needing it are two very different things. You may get the baby, and lose the boyfriend, and then there will be another drain on our tax dollars, and society, all because you had to have a baby when you don't even have a husband. I think that any woman that has a baby under the age of 25 without a husband and means to support the child she be forced to place the child up for adoption.
Seeing as a day ago you were asking about overdosing on aspirin and implying you live with your parents, I really don't think a baby is the best option at this time. Get straight whatever is going on in your life before you have a child and bring your problems down on their life.
You just admitted that you overdosed on medicine and now you wanted to have a child? Obviously, you're still living at home and presumably underage, and not married. If you want attention, fine, but talking about bringing another life into this world? You are not ready mentally, financially, and a host of other things, especially being a parent. Please get some psychiatric help.
Sweetie, babies do provide something to love, but it's not good to have a baby so there's something to love you, it doesn't work that way. Take care of yourself, get your feet on the ground and then consider having a baby, okay?