What benefits do I get since he is starting dating after one year admitted that he doesn't want to be with me?

In order to be entitled to military spousal benefits, a partner must have been married for a minimum of ten years. If you bought property together, you are entitled to a share of the community property because you're a Texas resident. You're also entitled to child support for your son in the event that you two get a divorce. I recommend that you schedule a consultation with a family lawyer who is familiar with the issues that come along with being married to a service member. Good luck.