Hiya lauren.. for a start if hes having it 3 or 4 times a week.. he must be addicted to the stuff by now?.
Id be more worried thats your bf is a coke addict by now and he needs help. But he needs to realise this himself.
Ive lapsed a couple times this year off coke and im doing my best to quit. But because your question isnt really about you want him to stop i wont answer that.
But going back to your original question.. were is he when hes having the coke? Is he in his house or on nights out?
If he says he will be paranoid if you call.. why should he be, if you know hes having it?. He could either just cba to reply to you.
Or… if hes on a night out.. i aint going to lie to you. It does make you horney.. and flirt a bit.. and cheat.. so does alcohol..
But then again. He could be doing nothing.
But id tell him get help if i was you and sort himself quik. Its leathal that stuff. And i wish i never started it.