@Emily Smith
You described your fiancée and he reminded me of myself. I was that same person , comfortable with what I had and was okay with it. Not knowing that I am capable of being greater than my own expectations.
My fiancée saw that and basically in PG terms , asked me to leave , that it was over for good. Many lonesome nights living back at home with my parents at the old age of 38 in my old bedroom where I grew up , and many prayers did I realize that I failed my family and myself. Long story short , I never gave up on her and myself and by the grace of God. I was given a second chance.
Life’s still not perfect and it’s not always going to be , but , it took that time away for me to realize things on my own. Not encouraging you to do anything that you are hesitant to do , but , follow your heart and do what’s right for you. If it was meant to be it will be. If not at least it teaches him a hard life lesson and maybe just maybe he can better himself after it’s all said and done. Good luck and God Bless