How does one overcome this or is Chiron something that will just cause me I healed pain forever?
Chiron is the wound that you're always in the process of healing. You can get more healed, and will throughout your life if you're tuned into Chiron and working with it well, but there's so much healing to do that it's a lifelong process. A human lifespan, even a long one, doesn't contain enough time to become perfect--or perfectly healed and whole, either. The best you can do is come close.
That doesn't necessarily mean you'll never be comfortable with physical intimacy. Just that it's a process for you. There are many degrees of comfortable. If you're in the process of becoming comfortable with it, you could be more comfortable than you are now a year from now, and more comfortable still five years from now. But still with room for improvement.
It's also possible that your fear of physical intimacy is a stand in for something else. Have you looked at what might be driving this fear?
It doesn't sound like physical intimacy is something you just plain aren't interested in. Some people really are not, but if you were one of those people, it wouldn't bother you. That not being comfortable with physical intimacy does bother you is a sign that part of you does want it.
And the meaning of "physical intimacy" is very broad. Are you comfortable with hugs, at least with close people? Or not even that? Assuming you're talking about sex, is it a specific kind of sex that scares you? (I'm not asking you to describe that specific kind of sex, if there is one--just want to point out that sex can mean lots of different things, not just the "put tab A in slot B" definition, and for some people, the usual definition of sex just isn't their cup of tea. That says nothing about their actual level of desire for sex, and nothing about which gender(s) they're attracted to.)
The first step is to start at whatever level of physical intimacy you
are comfortable with. And if there's something you're not comfortable with currently, keep it off the table. If you're working with your fear, what you're comfortable with might change over time. But don't force yourself into accepting anything you don't want at the moment.