My cholesterol level is has been a giant thorn in my side

I honestly need help. I don’t know what to do. So my problem is with my cholesterol level. I’ve been trying it for three years yet it refuses to go out. So my mind thinking “Only eat salads, workout rigorously, to hell with fun, to hell with games, to hell with everything that makes you happy, you need to lower that level and THAT should your only priority. I DON’T CARE IF I’M HAPPY AS LONG AS I GET THE HEALTHY BODY I YEARN FOR. I don’t know what to do.