Welcome to MSF, I hope you find the forum as helpful as I have.
Are you still seeing this guy?!
You say "No. Stop. I don't want you to do that."
What are your ages?
My feeling is that you should dump this guy... and fast.
Take time to work on yourself and your boundaries. There's a book called "Boundaries" by Henry Cloud you could look for at your library, or if you want an inexpensive copy, there are used books here:
AbeBooks | Shop for Books, Art & Collectibles