Marriage

Me and my S/O have been together for about 2 years now. Marriage was ALWAYS been a rocky subject due to him not having a good marriage to look up to but I've had the opposite situation, other than my parents divorcing. I'm worried this is going to play a big factor in where our relationships plays out in the future with the way he shrugs off the subject. Is this a bad sign? I don't want to doubt him but it makes me nervous.😔