I started some pre reqs around 35, started BSN program at 37, finished at 39. I was able to work full time through the first two semesters (spring/summer). If you have the will and desire, nothing is impossible. I was the oldest person in my class of 110 students. Only 50 of us graduated without having to repeat courses. It was hard but it was worth it.
Don't blame nursing for your poor decision making. Life is tough. Sometimes you have to do things you don't really want to do. It's called being a responsible adult. Graduate, pass the NCLEX and find a job. If you panic, essentially 7.5 months before you need to, you're not going to like nursing. And on a personal note, your fiance is looking for an out. Just saying.