boyfriend called me an "opportunist" and I feel terrible about it.

(21F) My boyfriend (24M) called me an opportunist because he thinks I only am with him as just an experience. This is the person I plan to marry and be with the rest of my life and he is not an experience to me but the person I want to spend the rest of my life with and he feels the same. He lives in another state that has perpetual nice weather. I moved to be with him from my state a thousand miles away so we wouldn't have to be long distance anymore.

The main reason behind this is he often compares me to my mother who is divorced from my dad, and has had dated a few people and even got to fly out of the country and she's not with that person anymore. My boyfriend says I'm trying to do the same thing when I'm not and I'm fully committed to him. He thinks I treat him like an option or not a main priority or just uses him for resources. It hurts me so much inside because its not true. I hate having to feel like I need to "prove myself" because I'm being heavily compared to my mother. I've never done that to him. I've asked him before to not compare me to my mother because it hurts me, he still does it nonetheless.

I know I'm not giving much context. There's a lot more to say, but the main reason behind this post is just me taking extreme offense to this or if anyone else has been called this before by a partner.