You were L's suspect of being Kira, so he took extra measures. By what that means is being handcuffed to him 24/7 and be under surveillance, just in case. Of course you've told him you weren't Kira, even though you were.

now here y'all were, in this same bed. Unfortunately you have tons of anxiety around guys, even if they were innocent as L.

".. You should go to sleep, it's 2 am.." he said without looking over to you, still looking at his laptop.