I think being crazy and being deeply in love with someone (who you’re not with) is basically almost the same thing. :D
And tbh, I think he’s using all of his energy to be able to resist her. I don’t even know, guys, this is just my two cents. I could go on and on about how I think he’s still totally hung up on her and how she’d be so good for him but I don’t have the energy for this atm, lol.