The girls are right on the money, and I agree with them all. If there's anything I can add, it's that you need to remember that whatever you decide, it's not just your life that will be affected. FI deserves to be with someone who truly, deeply and honestly loves him (as do you!). If you're not that person, then as hard as it is, you have to give him the opportunity to move on and find that joy. The same goes for you too -- don't settle for anything less, or you will forever have a case of the 'what ifs'. Good luck sweetie, and good for you for being strong and mature enough to not only acknowledge that something is not right, but also to take steps towards resolving the issue.