I've had chronic health problems since I was a teenager, both physical and mental. I've had two significant romantic relationships in my life, and my health problems caused major problems in both of them. My girlfriends swore up and down they cared about me in spite of my health problems, and they'd stick with me regardless. Both of them ended up saying very hurtful things about my health when we broke up, and cited it as a major reason for leaving me. That really hurt at the time, but in retrospect it was just an easy thing to focus on. Both relationships were flawed in so many other ways, and my health wasn't the cause, it was just the snag that kept the problems from being covered up. There were so many other problems with communication, and insecurity, and immaturity, and so much else; both them and me. My health was just a clickbait headline and not the real story.
You could sit your boyfriend down and explain to him exactly what being in a relationship with you would mean, and all the issues you face, and it's still possible that he wouldn't really understand what it means until he's lived through it. I think that's true of every relationship, though. Even healthy people drive each other up the wall. You probably should talk about your issues at some point, but don't put pressure on yourself to perfectly explain everything, or think that you're spelling out some warning label. How well you explain yourself in one conversation is not going to make or break the relationship, and no matter how well you explain the "care and handing of me" that won't determine your romantic future. A relationship is an ongoing effort, and there are so many other things that will impact your relationship besides your illness. If you communicate with your partner, and keep working at it, then if you're with a right person for you, all the good things about you will be worth more than any troubles you face.
I struggle with this myself, but you are worthwhile to love, and your mental struggles don't change that. These days I don't even bother looking, because I don't want to face the rejection of getting ruled out before someone can get to know me. However, you've found someone who does know you, and has known you for a while. They may not know the full extent of your issues, but they know enough of you that they want to be with you, and since you like them, too, I think you should give it a chance. Your mental issues will continue to be an issue, but the wonderful things about you will continue to be wonderful as well.