I think you need a place of your own, where you know that no one is looking over your shoulder. Then, you have to get over the feeling that you need someone's approval to look at pretty girls. Those girls in the links are all gorgeous - they and the publisher expect you to like them! If your mother or relatives somehow disapprove of you looking at girls - especially at your age - then I would posit that the problem you have is that you've let them determine your sexual development.
I hope at your age that you've had a girlfriend, and have been on the receiving and giving end of some great kissing and exciting fondling - and that hopefully you've had a girl bring you to orgasm with a handjob or blowjob. Hopefully you've had sex, too.
Get your own place, move out, think of the girls you know who are friendly to you and pursue those friendships. Don't be a stalker, but drop some hints that you are interested in some good fun. If the girls know you as being shy, maybe they'll also know that your mother has been domineering to the point that you are missing out on so much. You might just already know a girl who's been waiting for you to emerge on your own, and maybe you'll get a "welcome to the world outside your mother's influence" blowjob - a welcome to a nice level of friendship.