^ youre "boy" is not getting pure coke. Hes probably getting good quality coke, but it isnt pure. The good quality is what is attributing to you being tired.
Coke is not a speedy drug. Its actually quite relaxing. Anyone who thinks they get good coke because it makes them energetic and off the walls is an idiot becase their coke is obviously cut with amphetamines. Amphetamines also attribute the feeling of isolation and not wanting to be around or talk to anybody
With good coke, its easy to sit around with a few close friends, watch a movie/tv and just talk. There is no urge to get up and run around like fools, or talk incessantly without finishing one whole sentence. Its a very chill drug. Then at the end of the night, its relatively easy to fall asleep. You get tired when you are done using good coke. You stay awake all night with amphetamine cut coke.