girl has crush on childhood friend

said childhood friend gets girlfriend

girlfriend only dates childhood friend to get close to girl

girlfriend falls in love with childhood friend while still trying to get closer to girl who is terribly jealous because girlfriend is just so pretty and so beautiful and they make such a nice couple and she really likes that theyre happy together but shes just so JEALOUS

after big climaxing argument which ends in tears and threeway kissing in the rain they all date