When will he emerge from the Man Cave?

Ellas
Hello...I was just wondering if you could please advise me about something...my fiance and I have been known each other for about 3 years, and I could tell you in countless ways how much he loves me and I him (I don't drive you nuts with that, promise). There is no one I love or trust more in the world, apart from my immediate family...I'm also familiar with the 90/10 principle (if you love 90% of the guy, he's a keeper and you can always deal/accept the other 10%)...but sometimes, once every 3-6 months, he retreats in his "cave" for 2-3 days...that means no calls, emails, texts, nothing. this time he's cut the cord for 14 days. I miss him so much, and just send a cheerful one-line text every day to say Goodmorning or I love you or something short and sweet, something that won't get him down--and because I'm 99% sure he isn't holding something against me (I know he deals with plenty of stress in his life, as do we all). I love him and accept he needs space...but two weeks seems a long time. Last time I saw him we had a wonderful day together and he was making plans for the weekend (which, well, we didn't make). I'm happy that he's okay (I called his house but he was at work), but I just feel so lonely and a little hurt from him shutting down so abruptly and completely. I don't want to drive him any further deeper into the cave, but I feel more hurt and stressed by the day...what should I do? How and when will he come out? And how can I be there for him when he blocks me out?

Thank you...
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And, by the way, I'm in my mid20s, if that makes any difference; he's early 30s...
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THANK YOU to everyone……. from what I understand he's

1. could have handled this more maturely, but 2. I'm also handling it the wrong way...

I agree that I need to talk to him about this-- I've told him many times that I'm one of those people who if you really want to hurt just hold a grudge (i'm the quick to flare up and even quicker to forgive type)... of course, everyone's different...so maybe I should just clam up.

but doesn't it take two people to keep the communication channel open?
When will he emerge from the Man Cave?
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