I have so much love obsessions. What should i do?

My mind is full of thoughts and fantasies about the girls that i love, actually obsessed in them, Especially celebrity girls. I don't exactly need to say their name here but maybe it would help you understand my feelings better. Emma Watson, Avril Lavigne, Amy Winehouse, etc. I think about them everyday, some times every single minute! I also switch between them over weeks or months and start focusing my mind on one of them. I've been thinking about Emma Watson none-stop. Everyday, every minute, i was imagining hugging and kissing her and other stuff. Since i didn't have her Email or phone number, I tried hard to get replies from her on Twitter but didn't get a single one. Either she didn't notice or she was just ignoring, it made me so angry and sad. I was even thinking about hacking her account and let her know that i need to talk to her. It took me a lot of time to lose the heat and chill out about her. However i am still trying. It's a while that I started it with Amy Winehouse. She died years ago at young age, but i think about her everyday and imagining hugging and kissing her. I even think about digging her grave! I just want to find a girl exactly look like her and style her in Amy's way. These imaginations are making me insane. Some times i feel I'm losing the concentration on my life. In a negative point of view, I call them 'obsessions' or 'mental complexes', in a positive way, i call them 'targets'. So what should i do? How should i solve this? Should i suppress my feelings and try to forget about them, or go for them and turn all of those imaginations into reality?