How long should I wait for my boyfriend of 4 years response?

Anonymous

Boyfriend and I have been together for almost 4 years. We have been through some tough times but nothing like recent. We’ve been fighting a little bit and I guess those things have built up. He found a message where I was talking about his sister saying she was a loser Last Saturday he got so upset and left my house in the middle of the night. Didn’t talk to me for two days and I had to call him and he still didn’t want to talk but we were on the phone for an hour and 30 minutes of him saying he was upset about what I did and had doubts about our relationship now you know and how he didn’t know what to do. he went on and on about his doubts (which has happened in the past) only difference this time is his anger, he’s non communicative. We had a diffusing talk which I thought was good since he said everything and we didn’t break up but he didn’t know if he would talk to me yesterday. It’s been two days since that talk and I haven’t heard from him. I don't know when I should reach out or wait and give him time since I know he’s fed up. He’s not a coward I believe he would tell me he’s done (he said it before) but I don't know what to do

How long should I wait for my boyfriend of 4 years response?
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