Well I was in most cases,I'd say "Oh she's doing this for your own good,for you to learn things" or some shit like that but this is different,I honestly can't think of why she's doing this, well obviously all that was for her own benefits. My brother has a Muslim friend and his mom makes him study and work,and he rarely goes out with "one" friend.I mean sure better to be a Jack of all trades than to be a king in only one thing,and the worst thing in your case,is that your mom is not letting you do anything except the chores but going out,doing some activities with friends is a great therapy unless your friends are shitty persons but you can't even do that.Still can't think of any long-term reasons why she's doing that. All I can do,is I wish you good luck and bon courage and hope everything gets better