Since you're excited this relationship is satisfying and is going well so far, it's normal to feel some anxiety if it should end or that you might not ultimately be on the same page.
There's a Chinese proverb you might consider: "That the birds of worry and care fly above your head, this you cannot change, but that they build nests in your hair, this you can prevent."
It'd be best to tell yourself that you'll be resilient no matter what happens, and that you have a lot of fulfillment in your life besides dating. All of that will still be there if things don't work out.
I'd just try to live in the here and now and have a wait-and-see attitude while the near future unfolds. If he hasn't told he loves you within the next 4 to 6 months, I'd certainly question him about that. If it were me I'd say, "We've spent a lot of time together. Learned all the important things about one another. Been intimate. So I'd like to know, do you love me?"
I know I wouldn't stick around if he started giving excuses like because of XYZ it's not in his comfort level to say it or it takes him far longer to truly know if he loves a woman. I would find that too high of risk to my heart since I feel love and he has some barrier. Best to take things as they are and not hope for change in the future.
Anyway, I hope it works out the way you wish.