Why do guys shut down when they are stressed or have a lot going on?

My boyfriend always shuts down when he is stressed. If you ask how he is doing, how things are going, or what you can do to help he won't answer. However, he will ask how I am doing and what I am doing. He still wants to know what is going on with me and has an interest in what I am doing.
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I did talk to him and he said he didn't know if wants me or not because his daughter doesn't want him dating anyone. His daughter would be upset if we were together. He says he doesn't know what is best and he doesn't want to make any type of major decisions and he thought we could just be friends for now. He doesn't know when he will be able to decide and to just give him space and room to breathe.
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I told him sure I will give you all the space you need I am not going to waste my time on someone who doesn't think I am worthy and can't decide if I am worth it I will just move on. But thank you for telling me the truth. Wish you luck with everything in your life. Hope you can get everything you want in life. Bye Bye.
Why do guys shut down when they are stressed or have a lot going on?
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