How long should I give my boyfriend to calm down after a fight?

BellaB
My ex-bf and I got in a pretty big fight over the phone last night. (We are very close and were in the process of getting back together) It was over something stupid, he took something I said the wrong way..and the fight got serious. He got really angry with me and said he couldn't talk right now and he was hanging up the phone. He text me right after saying how I ruined what should have been a good convo. I probably shouldn't have said what I said but I didn't mean it that way.

I called him a few times and sent like 3 texts apologizing and he responded once with "well you ruined it" and haven't heard from him since. I haven't tried to contact him since last night because I know he needs space after fights sometimes.

Do you think he will call me back? How long should I wait before trying to call him again? I am going crazy because I feel awful right now and want some kind of response from him. I don't want this stupid fight to stop us from getting back together

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We were together for about 3 years. Broken up for the past 8 months but have remained very close friends.
How long should I give my boyfriend to calm down after a fight?
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