How to become friends with someone you've liked for years!?

theres this guy who i had a fling with a couple of years back. i have crazy feelings for him. i compare everything to him and every poem/ movie/ relationship i see or hear makes me think of him! when ever i see him or speek to him or even think of him i get so upset! and its all because of how much i like him! i even get angry at him although hes done nothing wrong! i guess im angry at myself because i just need to put my self out there because of how badly i like him! the crazyiest thing is.. i love every single one of his flaws! hes just recently asked me to catch up with him again over the internet and when i read the email i swear my heart skiped a beat! how do you become friends with some one your already like more than words can explain!? i get so nervous or feel so strongly around him that im scared he'll never get the hint and ill just end up hurting more when nothing happens between us! ive never had this problem with anyone but him before so i hope i dont sound crazy! please help.. i dont know what to do! maby i should just get over him beacuse it will never happan! ah i dont know! help me im goin insaine!How to become friends with someone you've liked for years!?
Keep in touch with him.