I need help😔

So some background, my boyfriend and I have been together almost 4 years. I love him and I know he is the man I want to marry one day, but I'm starting to think he doesn't feel the same. He's become distant, barely touches me, and his overall personality has changed. A few months ago we had a talk and I asked him if he wanted me to be in his future and he said "I would like for you to be" but he doesn't know where God is taking him. This has been bothering me for months and I know I need to talk to him about it I just don't know how. I know God has a plan for each of us, but shouldn't he know if he wants me in his future (without a doubt) by now? This has been playing with my anxiety and depression a lot. I don't know how to handle this.