Get a lawyer and get out. There is no need for you to be financing his affair and lifestyle. Call a local divorce attorney and ask for some legal counseling.
You can commission as an officer...and be a second lt....All you need to be an officer is a 4 year degree...call an officer recruiter, you don't want to have to be on the enlisted side unless you have to..the pay is less, the work is harder...and much more bs...