My grandma wont let me talk to girls?

i live with my grandma im 15 and i feel so depressed that i cant talk to girls because we always have ******* busy days especielly on saturday but it seems like i cant even talk to girls at school without thinking of my grandma and we are always have to babysit on saturdays and when ever i go outside the babys come with me it really saddens depresses and angers me why cant i talk to girls oh yeah and in school im a "nerd" at school but i feel emo and im not a "nerd"