This sounds like a case of : "Girls are terrible, they want attention from guys all the time if they feel they are lacking it they will probably talk to someone they know will definitely give them the attention of being liked""we even went to Chessington together" Oh no, you are clearly soul-mates then, if you even went to Chessington together D:It's tricky but you'll just have to move on. You say you've been mates for about 2 years now? Keep it that way, you will enjoy your time together much much more