Your mom was definitely overreacting. Friends hold hands sometimes. Its no big deal. Hell, I've had friends lay their head in my lap and I would play with their hair. I'm not a lesbian either. Your mom needs a chill pill. Even if you were a lesbian, I guess I can understand any disappointment she may have because there are a lot of parents out there like that, but reacting the way she did is wrong, in my opinion. I'm not trying to bash her at all. I think you should do whatever. It's not like you're doing anything wrong. Just know that it may lead people to think that you're a lesbian. If that's something you'd be okay with, then go ahead, hold your friend's hand.