Yep. Not only possible, but highly likely, especially if he has been badly burned before. Guys get serious when they are ready and it can take some time, indeed it can take forever.
You have three choices:
Stay with him and keep it a bit of light fun.
Sort of the default option here, and not what you really want, but at least you won’t be lonely. You also will not move on, but that is entirely up to you.
Stay with him and hope he gets serious.
It is possible that his feelings will change as you see each other more. The old expression “Familiarity breeds contempt” has it’s counterpart in “Familiarity breeds love.” It happens. You could try to make it happen, but he’ll not appreciate that at all if he notices. He will notice if you try to manipulate him.
Your heart is already broken. Have a damned good cry and go find someone else who will treat what you offer with the respect it deserves.
I am making no suggestions as to which course you should choose, as I know nothing about your relationship. I am sure our fine readers will be able to provide guidance from experience.