I'm on student visa and got pregnant my bf s citizen,if we dnt get married & F stop going sch.will I gt deport

Yes, You are here to go to school. If you drop out then your student visa is no longer valid. You may be able to get a deferment for one semester for medical leave. But if you do not go back to school, then you are violating the terms of your visa. You need to decide whether or not you intend to complete your degree. And you need to decide whether or not you and the father are going to get married. If you are not going to do either then you need to go back home. You can call the state department and ask them for an extension. Ank if there is any way to transfer your student visa into another type. But don't try to stay here illegally.