my first true love

i was with this lad for about 8 month but a year before this i was with him for a couple of months but then split up. But now he has finished and i was ok at first i got a new boyfreind and was quiet happy but then i saw him with another girl in school i nearly broke down i want him back so much now i know this sounds stupid but i dont feel right with out him if you have been through something similar you would understand