I think you're making a mistake if you stay with him. End this relationship. Move on. Find someone with whom you can plan a future. You may want to have children. Being a nurse is absolutely nothing like being a doctor. You're in premed. It really doesn't matter what you're in. Finish college before you marry anyone. At least finish the bachelor's degree. Don't be rushed into something by a man who is desperate to pack what he can into the next ten years. Yes, he seems so charming and attentive to you. He's highly motivated to be. But he's also selfish.

Continue seeing him, if you must. But do not entertain a marriage preposal until you have graduated from the four years of basic college, regardless of what you major in - nursing or whatever. You are too young to be making this commitment. You say it's a "fairly new relationship." If he was the healthiest guy in the world, I would say, "Wait." He is in a rush. You do not need to be. You are insisting that God communnicate with you through signs whose meaning you have already decided on. That's not God you're hearing. That's you telling yourself that this is all divinely inspired. God may will for you to be a bit lonely for the few years it takes to get through college. You're looking for a fast escape from that.

He's "got issues," this guy does. God expects us to use great prudence in entering the sacrament if marriage. You do not really know this man yet. That takes time.

If I read correctly: you were in love, got disappoonted, and met this young man on the rebound. Slow down.