As much as I'm into common and "normal" sexual fetishes; I kind of wish I wasn't into tickling at times. My family knows about it (I made some mistakes as a kid and they found out about it), but I never mention it and I avoid the subject at all costs.
I have been open about it to some ex-girlfriends of mine, and I've actually learned that most decent women won't actually be bothered or freaked out about this fetish. The key is how you tell them about it, don't obsess over it and don't be an asshole about it. In other words, if they really like you and respect you, they will accept it.
But yeah, it kind of sucks being so into this type of fetish because most people think it is weird. On the other hand, I have gotten a lot of pleasure and enjoyment from this fetish; and I really do love it.