Relationship drama

So my boyfriend and I have been dating for 5 years. I’m 25 and he’s 24. We’ve always talked about marriage and moving in together and having an amazing life together. Here’s the thing. We always go out on small errand dates to eat fast food or shopping. That’s great and I appreciate it, but lately I’ve been bringing up that I want to go mini golfing or karaoke or dancing or something fun to enjoy our youth together. We both go to school but he works full time and feels he hardly has time to do that stuff. But I feel like he doesn’t make an effort to surprise me or to treat me more like a future wife. Whenever he is sick or feeling down, I’m always there to catch him and take care of him. But when I’m feeling sick, it’s just me taking care of myself. A part of me wants him to take care of me more and show me that he’s willing to put it in effort for me. And I have brought this topic up multiple times and my response is always yes love I will try. Today I told him that I want to enjoy my youth with him and do more fun stuff together but he proceeded to tell me he doesn’t have time and I told him that it’s okay that I will just start taking my self out more on self care days and he took it as a threat of me leaving him. How is self care days and independent days a threat to a relationship? I feel it’s important to take care of your own needs before anyone else’s. Now I don’t know what to do or say.