How do you know if the man your dating is the one?

and not just after a roof over his head and the little money i have? ive been seeing a much younger man for 9 weeks, he s never been married or had kids i have for 16 yrs and 3 teens and suddenly this young fit guy appears in my life how do i know he wants me really? whn will i trust him? ive been kicked in the teeth so many times i dnt know wht to beleive anymore he talks about us getting a place and furniture all the time and spent a week here over xmas says he loves me wish i could beleive him wht do u think?