I had a very attractive female friend when I was 16 in high school who had found out I was ticklish - I don't mean like a hehehe kinda ticklish, like a AHAHOLYSHITBAHAGETOFFOFMEYOUFUCKER kinda ticklish. I already had a tickle fetish, so I tried to hold back the screaming when it was her. I was normally a quick rib grab, or a few pokes, occasionally some stomach tickles. She seemed to enjoy it enough, and I think she kept doing it because she thought I hated. Well one fateful day, our relationship completely changed for the worst. Let me make it clear that we were NOT dating either, just good friends.
So one day I was at her house watching a movie, no idea what movie, I was too fixated on her, as I had a huge crush on her. Well I had my feet stretched out on the couch, and she had left to go grab a drink, and I stretched my legs out fully. And when she came back, she sat right on my ankles, and I had started smiling nervously, worried yet excited she would start tickling me. Well - my suspicions were confirmed when she started scratching my socked feet slowly occasionally, and I'd try to pull away but to no avail, and I'd giggle and squirm my upper body. Well, she had stopped with occasional teasing and scratching, and had started full out tickling - the arches, under the toes, everything - I was in hysterics. This was way too much for 16 year old pubescent me. I got a little excited.. Down there, and tried to lay on my side to block it from her view. She kept going for a good 2 minutes, and I was sweating by the end of it, but I feel as though she had to notice it. Out of fear, we soon stopped hanging out completely, even though I had been planning to ask her out. Looking back on it, she probably did notice it,it was pretty obvious, but why did she keep going then? I will forever live my life not knowing because of my awkward-ass 16-year-old self. :cry
Tl;dr 16 n was getting feet tickled by potential love interest, got a boner, think she saw but kept tickling, stopped hanging out with her out of nervousness, will never know what could have been