faking orgasms

so i’ve been with my boyfriend for 2 years. & we have incredible sex, but i never actually have an orgasm from it. i do from him going down on me & fingering me, but not from sex. but my problem is that i started faking orgasms a few months ago because i did it once & he thought it was really hot & i like seeing him like that soo i kept doing it. & now i still do it every time & i want to stop because i feel like i’m lying to him but if i do stop i feel like he’s going to think it’s not as good for me anymore or he’s going to know i’ve been faking... what should i do??