I’m just not myself lately

I’ve recently fell into a darker place in my life without any explanation. I have a great job, the best boyfriend I could ask for, an amazing family, recently moved in with my man, but I find myself struggling to be genuinely happy. My boyfriend is incredible and loving and does everything to help me feel better and he feels like he doesn’t make me happy anymore. I don’t know how to explain what I’m feeling and I don’t know how to explain to him that HE isn’t the reason I am unhappy it’s simply just how I’m feeling internally about myself and I can’t even explain to him or myself what is going on. I try not to put my negativity on him but it radiates off of me and it’s hard to hide. I just need some advice or something to uplift my spirits and help me out of this, and how to explain to my boyfriend so he understands it’s not him. I gave the example of “its like the lamp stops working so you keep replacing the bulbs but it’s not the bulbs that are broken it’s the lamp” that’s just the easiest way to explain what I’m feeling. Thank you in advance ❤️