i don't know what to do

ok so i have this "friend" we're supposedly best friends. but here latley she's been getting annoyed with me and she doesn't tell me why, and i've been getting annoyed with her. though i can't tell her why and its mostly because of her mother. (her momis worse than a hover parent..won't let her be with anyone) and...i'm tired of having her rely on her mother to make every little decision for her when ever i want to do something with her. i was fine with it before, but now it's getting annoying. i dont know what to do. i'm thinking about ditching her. we've had a good run so far but i think the friendship has run it's course. 

reason i say this is, she's 23 years old, and her mother makes her do all the house work so that she can't spend any time with her friends. she doesn't really need her mothers consent anymore. i still ask my parents but it's for schedualing reasons. cause sometimes my parents don't tell me whats going on that day or the next day or the day that mine and my friends plans have been made. HER parents just drop stuff on her even after she's already said that she's going or coming over to my place. i'm just. i don't know what to do, or say, or think anymore. she's the only friend i have. i'm one of these people that can only handle few friends. and she's the only one i have. my mom said to be patient but i'm getting tired of this game.

for instance, earlier tonight i sent her a text to see if she wanted to come over for a movie tomorrow night and was willing to make changes if she couuldn't make it. well, she still hasn't answered back. i'm thinking that it's a rude way of saying no or her mother has her so distracted with doing house work that she can't answer. or she's too busy fucking her boyfriend. (she's been fucking him since jr senior years in highschool). i have to admit, i do want my friend to my self. i'm afraid that when she gets married to this guy or angaged to him that i will loose her anyway. 

but honestly i don't know what to do with her. her not answering is getting annoying. oh yah and one other thing, she keeps pushing me to go with her boy friend to go see sci-fi movies just because she doesnt like them. i don't want to . that puts me in a very bad possition. it's not that i don't trust my self, it's that i don't trust him. i know how guys my age are, all they want is sex and  nothing els. they dont care about the girl they are with, if the girl they are with won't give them sex, they move on. and i don't want my friendship to end that horrible way. i just. ugh. i just don't know what to do anymore.