Heart Breaking Jealousy Help Please!

Hi everyone,
I am a 15 year old bisexual girl. I found out I was bi about 4 and a half years ago when I got a piano teacher and at the time I was 11 and she was 16 and I first saw her walking down the street to where I was taking ymlessons and I immediately got butterflies, anyway I developed a crush on her throughout our time together and when she left for university about a year and a half ago, I was devestated and I did cry. I finally realised I was most likely not going to see her again so I sort of forgot about my attraction to girls (if that is possible). When I met a girl in year 7 I thought she was great just my type of friend, about two months ago she invited my to go to a pottery class and we have bonded ever sonce we are closer than ever, I am EXTREMELY protective of her and I have been gradually developing feelings for her she is now giving me the same feeling that my piano teacher gave me however I feel more connected to this girl, she is beautiful and amazing and I... ggrrrrrrrr..... I can't even put into words how I feel about her. My main problem is is that she is currently friends with a girl and they are very, very close they are best friends and I know that neither of these girls are bisexual like me but the girl I like has actually siad she would love to live with her friend, she even went as far as saying if given a choice she would marry her (even talking about this makes me angry!). Last week we were at our class and her friend has started to come which has annoyed me (I don't know why) and this boy came up to her and asked if she was seeing anybody, she then grabbed me by the arm and put her other hand on my shoulder and said "I love my girlfriend, sorry" after that my stomach churned so much I wanted to bounce off the walls and we were in fits of giggles for a while. I HATE, no, no wait I ABHOR, DEESPISE, AM DISGUSTED by her other friend she is horrible but the girl I like like her! I am so jelous and I really love her I would do anything ANYTHING in the world to make her happy I really do, honestly love her. Can someone give me anyadvice on how to deal with my jelousy. I also should have mentioned that she nor her other friend nor anyone else for that matter know I am bisexual, I only came out to myself about 9 months ago properly. Please help me if you have any advice thank you.

Since the girl isn't bi/les and a relationship isn't possible, I think the best way to deal with the jealousy is acceptance. Accept that what you wish for with this girl simply cannot be.

After this pain passes and you've accepted what is---and this will likely take a while, but it WILL pass---then look to form relationships with girls/boys who are affectionately compatible.

I'm sorry. I know this bites.

I agree with skydancer about that you just have to try to accept this.