Thank you for writing. I think it’s a very loving gesture for you to try to figure this out.
It’s just true that different people have different levels of need for physical contact and physical expression. It’s an issue that almost every couple has to navigate at some point. But in your case, you say that you have always been uncomfortable with it. That suggests a couple of things that might be useful for you to explore:
First, it could be that you are “tactile defensive”. Kids who don’t like much physical contact often have a sensory processing disorder that makes contact uncomfortable. Research it and see if it makes sense to you.
Or it may be that someone broke your trust around physical contact when you were younger. If someone you trusted hurt you in some way, it would make sense that you don’t want someone to be too close.
In either case, there are therapists who can help you sort it out and figure out what to do about it. You are only 16. Now is the time to address it while you are young and your brain and body are still developing.
I hope you will follow up and talk with a counselor. You and your partner both deserve the sweetness that comes from physical intimacy.
I wish you well.