Yes, I can sympathies. I've been there. yes, sometimes it can suck.
There is a friend of a friend who has fantastic feet and goes barefoot in the warmer months. My first friend had told her I have a thing for feet, so there's been times she would tease me with her feet, but then her fears and nervousness would take over, and she'll isolate. I asked to take some photos once, and she balled up into a giggly girl, and said that was a bit too intimate. Okay, but since them, she's had occasion to tease with her feet again, and then get scared again. I feel like I'm being jacked around, though I know it's coming from her own insecurities, and she likes the attention. I generally only see her when she wants a favor, but when she's barefoot, I don't know if its safe to look or not.
Now in the colder weather, she keeps her shoes on when I see her, but when she talks, and starts waving her hands around, I get distracted and think of her feet waving around like that. I've wanted to stop doing favors for her, but I like her. Otherwise, she's very grounded, intelligent, and I like talking with her. However, the not knowing what's going on with her foot teasing and not wanting to talk about it makes things stressful for me, more so than I'm comfortable with.