@marymayx0x0x,
The first thing I would do is to talk to him about it. If after you've attempted talking to him about it and you still have the issue, then he's not the one flor you. When you are looking for answers about this, he's the one you'll get your best answers from. If he puts off the discussion or dismisses it, then you have your answer - he's not thinking of your needs.
He might not know how to satisfy you. Young men can learn to be patient and gauge their energy and lsiten to a women's signs when they're ready. So you need to teach him about what turns you on and when you are ready. Make sure he's on board with it. At first, talking about it might seem a little awkward, but he'll appreciate it and so will you when he gets it right.
When we are young, we don't have as much self esteem as we do as we gain more experience. Tell him what you want and need and be sure he answers you. Otherwise you've got the wrong lover. Can you imagine if he doesn't respond to these needs, how he would respond if you were pregnant?