Most Helpful Guy
Neither. You should call him and express to him that way. I never fully understood "I need space" too much to be honest. It just seems like an odd thing to say that doesn't make sense as it's open and vague. Personally, I wouldn't wait too long to call him. I'd probably just call him as soon as I was mentally stable. So, compose yourself, think of what you want to say and say everything. Absolutely everything. Hope that helps.
Most Helpful Girl
u can write it maybe just for u or maybe after u write it take some time and if u see the need of letting him know. then u can send it (I would do that)