Hi Fair
I'm 38 yo man and I can tell you this is normal. In my own experience and other accounts I've heard this happens in many relationships. I think it has more to do with ourselves rather than the other person. That's not to say this is the right person for you. I'm just saying this will happen eventually with others as well. The best thing you can do is work on yourself while you are in a relationship. See, a relationship is supposed to be cimplimentry to your life not your life entirely. You making a family will come best if you empower yourself with work, or a career, of something like that. For some reason we are programed in our lives to have a family and make that life, but when it becomes our priority we sacrifice the things that really are important to us; things we don't know and find out later that are truly important. If you are not feeling it, let it go. If letting it go is a mistake then make the mistake. Rarely you lose out on the "one that got away". More often the case becomes "I wish I hadn't waisted my time on this". Trust yourself to recognize the love of your life, especially when you have not met them yet. Don't believe in " the one that got away" bs. There is no "one" out there. There are many out there. Do both of you a favor. If it really is ment to be then it will be even if you screw it up.