Should I withdraw my OTS application and fight for custody or go and risk only seeing my son a few times a year?

That is a great song title 2d Lt (Join to see)
If the reason she wants to bail on the relationship is because of your military service and the risks to you then I would considering staying where you are.
However I suspect there is more going on in the mother of your child's heart and mind.
I think you should follow your dream. You don't know what the future holds for you, your child and his mother. I recommend you pursue the OTS and UPT but do your best to keep a relationship with the mother of your son. In any event always teach you son to respect his mother no matter what she does - she will always be his mother. Do your best to treat his mother with respect whenever you are interacting with her. Try to listen more and talk less.

First let me say ive been married for 25 yrs. Not all peaches and cream. We almost divorced so i get thinking about seeing your children occasionally. But in saying that as parents to a child (wether youre together or not), it would be kind of hypocritical to tell your kids "never let anyone stop you from your dreams" and then you do it. You have to be true to yourself. When we were split i made the most of my time with them and made sure they knew im always there. And it all worked out. I hope this helps. Good luck

2d Lt (Join to see) The choice is for you alone to make. You know what the circumstances of your relationship are better than any one else, you need to be honest with yourself about that. Realistically look at what your child visitation/parenting would look like if you were not active duty. Take this into consideration. You do need to ensure your legal standing regarding your child, you need to do it now before there is any animosity (hopefully there isn't already). There is legislation in place to prevent your losing custody of your child because of your military service. Others have come before you to pave the way. You need to look specifically for information on "Legal rights of military fathers", the 2003 bill called the Service Members Civil Relief Act, signed by President Bush, is the main guide for deployed fathers. Next you need to look in to what support options are there for you as a Airman through your family readiness group. Also keep in mind there are men who have full custody of their children and still serve their country. Support networks are out there, you need to not overlook them before you make your final decision. Good Luck, I hope it all turns out very well for you.