Advice welcomed!

Me and my boyfriend have been together for 5 years now. We started to date our senior year of highshool and all through college (long distance). We started off as best friends but now big questions are coming up in our relationship. I want to get married and have children with him eventually. He is very goal oriented and wants to start finding a good career field. When he talks about his goals, our relationship never comes up. He talks about his career more than the goals we should have for our relationship. I told him that we should plan for an engagement and all of that stuff that comes after. Marriage, children. He said he does not want to get married or have kids with me or anyone. This blindsided me. After that conversation, marriage has been brought up a couple times in public with friends. In public he will talk about getting married and all of that but in private he says that it’s not going to happen. Today, we are having a fight about money. He is asking me to pay him back for things I thought he bought for me without the intentions of paying back. It seems that he has gotten very possessive over his money and maybe that’s why he doesn’t want to get married. He wants his achievements to be his and not to share what he makes. What do I do? There’s a lot of love in our relationship but we are not seeing eye to eye. I am willing to share everything I have to offer him but that is not reciprocated.