I was in a similar situation as you. In an aviation program and 200 series in AFROTC. I ended up having some knee issues which required surgery and decided to drop the ROTC route and concentrated on finishing up my civilian ratings. Anyway I was able to flight instruct my last year of college and got hired at a regional airline immediately after graduation. Fast Forward 11 years and I am now at a legacy airline (about the same amount of time that my peers in the military were hired.) I do regret not having served in the military and if I could reverse time I probably would have pursued a guard slot. While my airline flying career so far has worked out I will always wish I had been able to serve my country.