time is very important, it eases the pain. if you have pictures of that person or have to see him a lot, it's better not to... because the more you see the person the more he is on your mind.

sometimes finding another person to love can help you to forget... but you have to be careful with this method because sometimes you might become a user of people and hurt them.

and also spending time with people you like, friends, meeting new people, doing sports or a lot of fun activities can help to cure the heart.

the worst method is TASTY food :D because it makes you fat, but it gives you also good emotions...

also think about that person more objectively and try to see the bad sides of him. then you might just stop loving him and idelising.

well as you see there are few ways to cure yourself and go back to normal life... you just need to find the way which is most suitable for you :) I hope I helped... I hate when I can't forget some people, it's the most difficult thing, so I know what you're going through...