bestfriend turns me on a lot

Hello, my name is Jordan. I'm a boy, and 16. My parents where out for the weekend so I decided, to invite me bestfriend over. Her name is also Jordan. She's 16 too. Awesome eh? Haha anyway, jordan is a super pretty girl. Brown curly hair, green eyes, tall, skinny, nice ass. But she's my best friend, I don't like her more then a best friend. This is gonna be a long post, so please be patient with me(: So on Saturday, she came over with her bags (full of clothes,toiletries, etc..) We watched a movie, then went on a super long walk, and went grocery shopping (I had like no food in the house). After all that, we decided to lay on my bed and do nothing. We just layed there and I kinda talked about old memories (we've known each other for like 10 years). All of a sudden, she climbs ontop of me and hugs me. I got kinda aroused/turned on when she did that. Like her ass was right on my d*** .After that we fell asleep. The next morning was weird, I woke up with her leg wrapped around my wastes, and her boobs in my face. Right there and then, I got an erection. Her private was like so close to my d***. She woke up, and things turned awkward when she saw my erection. We barely talked the rest of the day. Just small, awkward smiles. We started to talk again around 2:00pm. I told her the truth, and told how I got an erection. She laughed her head off and turned a movie on. I layed on my back on the couch. Then she was laying on my chest. It was awks but it kinda turned me o again. Its like, everything she does turns me on. I kinda wanna f*** her...... Like really badly. I need help. Idk what to do. I wanna ask, but I don't know how. Someone help me please! Thanks.