the gap between us

For the past wk,we practically haf no contact at all.Mon we sat together during tut...but i didn't tok to him.He also didn't haf lunch wif us.The other days...it's either we have diff tut or we didn't sit together.Online we also nvr tok to each other.Just now he msg me and ask me to lend him maths notes...guess he still feels closest to me in class.But everything seems to be in e past.I still rmb tt day he bought lunch for me and we sat together to eat and tok...it feels really happy and natural.But now...i dunno y e feeling of awkwardness comes in...and i just couldn't face him like e past.He ask me y do i seem so far to him now.Wat shud i say?I myself couldn't find e ans to this qsn.