Should I tell my husband I cheated?

My husband and I are early 30’s with no kids. We’ve been together since we were 18. We’re happy & very much in love, but life often gets in the way. He has a very demanding job & often this interferes with ‘us’ as a couple. I recently travelled overseas for a family wedding - due to work commitments my husband couldn’t come. The best man who I’ve know for many years was also travelling without his girlfriend. We were sharing the same holiday house & as we were the only couples there without our partners we seemed to spend a lot of time together. I picked up on his discreet flirting during the holiday and I enjoyed the attention but didn’t really act on it. The night of the wedding we were the last 2 standing at the ‘after party’ in our holiday home. He invited me to continue drinking in his bedroom so not to wake the other house guests - I was very drunk and so I went with him. Eventually we ended up kissing - completely instigated by him! For around 2 hours we passionately kissed and played. He made me feel good about myself and my ability to turn him on - something I’ve not had from my husband in a long time. Sex has become routine. I didn’t let him play with me and nor did we sleep together as my conscious got the better of me but I enjoyed being intimate with him & the way he made me feel so special. I returned to my own room & he was fine with that. He’s the only person in 15 years I’ve been intimate with other than my husband & as guilty as I feel for what I’ve done e I did enjoy it, a lot! The following day we all travelled home - the guy & I to different cities. It was awkward & we didn’t really speak: mainly due to my guilt. I feel so guilty I wonder should I tell my husband? Or should I perhaps be concerned at how much I enjoyed what happened & questioning my marriage? I can’t stop thinking about it & the way he made me feel. My husband doesn’t make me feel that way any more. Please help or share similar experiences.