<human>: Can you succinctly summarize the text in 1-3 sentences?

I've known her for 5 years, she's been engaged to her SO for about 12 years now. 

I was very drunk and she was showing me to the guest room. She was leaning over me, making sure I wasn't going to fall off the couch, when she starts deeply kissing me putting my hand to her breast. I was a bit too drunk to control where my hand was going, so she was guiding it over her body. We eventually stop because her fiancé was calling out, wondering where she was, apparently she had been gone for a while.

She told me later that it happened because earlier in the night, I had been talking about certain sexual things I like doing, something she absolutely loves apparently and it turned her on.

We talked about it the next day. We decided that the thing between us shouldn't go any further; her wedding is in 4 months, and she had cheated on her fiancé once about 8 years ago and it almost broke them up. She was unsure if we should tell her fiancé about what happened, but I told her we should just keep it a secret and forget it ever happened. She upset and worried that I hated her now, but I reassured her that I still cared about her and she is still my friend.

I've been feeling like complete shit about it ever since that talk. I did have a crush on her a long time ago, but that ship sailed when I found out she was engaged, and I thought I had gotten over it by now. We've just been good friends for years. I have no one to talk to about it. I don't know. It hurts a lot. Logically, I shouldn't still be so upset about it. The only other options would've been to tell her fiancé about it (causing lots of problems for her) or try to pursue a secret sexual relationship with her (causing even more problems). Did I do the right thing?
<bot>: Engaged friend makes out with me, we end it there and keep it secret. Did I do the right thing?