He wont introduce me to his family

Hello. Hoping to get some input on my situation here.
My boyfriend and I have been dating on and off for 5 years. We met at a rough time in my life but have mostly managed to get through those challenges. In the beginning I was the one who insisted on taking things slow- I wanted to keep it casual and he wanted to be serious. At the time, things weren’t going well for me professionally so I wasn’t in the right headspace for a commitment. Fast forward 2 years in, I felt like I was “whole” again and could hold a serious relationship. Things have been pretty stable for us the past 2 years but now he just won’t introduce me to his family. The one time I brought it up he said it was because he felt our relationship had been through too many downs so he doesn’t want his family to build a relationship with me only for things not to work out. He insists the only woman he wants to introduce to his mom is his wife. He says if we can get to a place where he’s confident I won’t bail on him, then he’ll consider introducing me to his family. I’ve met only his brother but I feel like all his other girlfriends have met him as well. He is generally an amazing partner, he does everything that a loving boyfriend would do (even though I’ve had to train him on some parts) but mostly, he’s supportive, he’s a good listener and advisor- I’m just bothered by how there’s nothing “futuristic” about this relationship. Sure we talk about the future, but I can’t be certain if he’s just telling me things he knows I want to hear. Apart from not introducing me to his family, another issue I have is how he refuses to deal with conflict. He always wants things to be peaceful and happy and I’m not sure how realistic that is. Sure I don’t want to fight but should it happen, I want us to be able to resolve the issue like adults would. He literally would rather not talk then to resolve conflicting issues.