My crush moved and i haven't seen him since?

[Katherine]

It's been 7 months since my crush moved and I haven't seen or heard from him since because he had to change his phone number when he moved. I miss him very much and I'm still in love with him. About a month ago I found out where he moved too and I want to write him a letter, but I don't want it to sound like a desperate love letter because he may not feel the same way he use to feel for me. I just don't know what to do I want to tell him I still love him, but I don't want to sound desperate and I have no idea what to write to him. Please help (p.s. I'm in high school)