I am in a relationship with a rabbit he is 87 I am 81 its been nearly two yrs

Is this relationship going to last. Will we have children and be happy together?? Is he the right man for me?? Am I being insecure or is my gut feeling that he has settled or I am his good enough for now true?? Is he using me for stability ?? Is he cheating or will he cheat ?? I am afraid as I have been heart broken before and don't want to hurt my 6yr old again or myself ... Help ??