Is it cheating - enjoyed a sexual massage?

[boi2b89]

So I am in a monogamous relationship with this great guy. We went to a trip together, and I got a real backache. I went to this massage parlor that is for gay only. I went naked and let the masseur touched me. It was sexual (he touched my scrotum, butt, thigh... with the intention to lead to a happy ending later, obviously). And I kinda enjoyed it. However, after 10 mins, I felt guilty and asked him to stop and went home. Now I am not sure if I should confess to my boyfriend. I mean, I shouldn't have gone to that parlor in the first place. I feel so guilty and it is eating me up from the inside...