I agree with the above post and as far as getting over her set your self a goal try to meet new freinds or get involved in activities that will take your mind off of her things that you love doing that will make you happy and keep you entertained theirs plenty of people waiting to be met and who need a freind just as you do go out and have a good time and find that person and who knows over time the freind that descided to leave might come right back when they see you happy