Dear Annie: My girlfriend and I have been in a relationship for 12 years now. We have a lot of history. I’m 54 and she is 55 now. We were best friends for a year in high school and we had a few incidents when we kissed back in the day. I left home for the Air Force in 1988. We kept in contact here and there. We both have been married. She had kids; I didn’t. I moved back home in 2010, and we…