Helppp, please.

you need to get some self confidence.
you should be happy she isnt dragging you to katy perry.
and maybe make some new friends.

It's easy for anyone to say that starting at a new school is a great opportunity to make new friends. And it certainly is a great opportunity to do so but if you stop trying too hard to make friends you will find it should happen without you even realising. "Be yourself" is such a simple piece of advice and from what a gather from your post, it is a piece of advice that will do you a lot of justice. If you feel like your friends are leaving you out you can do one of two things. You can 'leave them out' too, and by this i mean give a bit of a cold shoulder and dont always be available when they want to see you. Make them realise you are confident and independant, even if you have to fake the confidence. This is obviously a reverse psychology technique and will always work PROVIDED that your friends really do appreciate you. And its a win win situation because if this doesnt work then i strongly suggest you stop spending time with them. If your not comfortable doing this then maybe try putting yourself out there some more. Ask them if you can join them one night when they have plans that you weren't considered in. Invite them to your house or ask if they want to see a movie with you, get a meal together, whatever. It would be a good idea to ask if you can go to Katy Perry with them; dont feel ashamed or embaressed to ask if you can tag along, these people are supposed to be your friends. This too should show you just how important you are to these two friends. As for your soccer, if your injuries can be fixed through phsyiotherapy (depending on the injury) or whatever else can be done to sustain the injury (obviously ask a doctor) and you can again play soccer, have this as something to look forward to. If soccer is not an option due to your injuries, then deal with that. Simple. Find a new interest because its a big wide world!