I miss everything.What should i do?

Me and this guy where friends FOREVER.He was my best guy friend,well we went out.He was my first kiss.I would tell him everything.We broke up a week ago.But there was this party for my friend yesterday,we both were there,it was so awkward.I felt like he was looking at me,i also felt like people were talking about us,trying to get us back together,everyone knew something i didn't know,my best friend said "yea talk to her about *stuff*" or "turn away Sarah" it was just odd. We did talk some,but not like we used to when we was best friends.He did text me after the party just "hey whats up?" type thing.And he did accept my family request(i added him as a brother) but it's not the same.I'm over him in relationship way,just not in friend ways.He and my friends would talk and hug like they usually did but i didn't have that,i was just an outcast.I was sitting there thinking "i wish we could be best friends again,i wish we could joke again.I wish you would hug me again." But in a way i know it won't happen he is moving schools this year,i'll most likely won't see him.How should i re-build our friendship? should i text him? last night did go better than expected i thought he wouldn't even glance at me,but we talked,he did joke some.Before i left he asked "are you leaving?" but i was just asking for directions for my dad,but i didn't get to say bye to him.And he did text me after the party.So how do i rebuild our friendship?without looking desperate or weird? Thanks to everyone!