Last year i went out with this girl on a date. I was also speaking to other girls, to keep my options open. However all her friends found out and put the girl off me. She was funny with me for a while but i think she carried on liking me. Everytime i am around her i always catch her lookiing at me. we were at a party yesterday and i got my friends to see aswell, she was giving me alot of iois. However the truth is I want to have a relationship with her as i realised my mistake. I tried to tell her how i feel but her friends wouldnt leave her alone with me if they could help it. When she is not around me though i try to text and she takes hours to reply and if i try to call it rings out alot of the time. I know the problem is that she likes me but she cannot trust me as she still believes i am speaking to other girls and she thinks i dont have an interest in her or fancy her. That is the complete opposite.
How would i get it accross i like her alot if we are never alone? Her friends told me she doesnt see me that way but everybody i have spoken to says they can tell she does.

I don't think you did anything wrong except maybe not being honest with her about dating other people. I'm somewhat in the same situation where I had a girl interested but strung her along because I was dating someone else at the time but didn't tell her. I think you have to live and learn and my experience taught me a lot. I too want a relationship with the girl now but she moved on. My advice though is if she knows you want to see her and you fancy her, there really isn't a whole lot more you can do except improving yourself and continuing to try to game her when you see her. If she isn't replying to texts or answering her phone though I would probably stop trying to contact her.