Try not to overthink things. It's difficult I know and I still do it but try to be more open minded. The more you worry about every situation that you may stutter in, it will never change and maybe get worse. As stutterers we have anxiety where we think ahead a lot, like you said, "Will I be able to maintain the relationship?" Of courses you will, even if you stutter. Everyone has their own issues and it is up to us to deal with them. With stuttering, being confident and putting yourself in confronting situations does help. I promise you this because I was lost as a person as well until I just didn't care if people looked down upon me if I stuttered or not. It was more about saying what I wanted to say to people who want to listen. Stuttering is not actually a punishment. It's an obstacle that we have to get over and will continue on our path to success once we've "jumped over it" by facing our fears and conquering them. Anyone can achieve their goals and if yours is to live an amazing life with a happy family and with little to no stutter, it is definitely possible and you shouldn't give up now.