sex help🙈😳

So my boyfriend and I have been together for 2 1/2 years, so it's no surprise that we're sexually active. There are moments when sex feels amazing and it's doing something for me but most of the time it doesn't really do anything, like ever. I don't know if it's him (he's the only person I've been with) or if it's me. I don't know what I should do, I definitely don't want to tell him that I don't enjoy it because I feel like that's hurtful. And it's not like I don't like sex because I do and if I'm going to be honest I'm the one who usually starts it 😂 but I'm just waiting for this big bang that sex is said to be and I'm not getting it, I don't feel it :/

Does anyone feel the same, is it just me??