Why is he suddenly being distant?

[Anonymous]

My boyfriend is being distant and I’m not sure why.
On Monday and Tuesday things were good! We had a nice evening after work, nothing out of the ordinary. Then Wednesday morning when we woke up he seemed off.
Wednesday evening he was distant and I couldn’t get much from him when I did talk. He didn’t ignore me, he did talk a bit. He is significantly less talkative than he usually is though.
I asked him if he was ok a couple times just to make sure and he said yes. I thought maybe work was stressing him out (I know he’s been busy there lately) but he said he didn’t feel stressed. But things still seem off. His tone of voice when he talks to me is very subdued, which isn’t like him.
It’s confusing and irritating that he’s clearly acting differently but says everything is ok. If it’s not work stress, is it us?
I’ll admit I’m an overthinker so my mind is usually trying to piece things together when I don’t have any info, in this sort of situation.
I don’t want to keep pestering him to ask what’s wrong when he’s already told me he is ok.
What should I do? Just act as if everything is ok this evening? Try to start conversations and get short answers?

[Guy13]

Damn your stressing. If I wasn't doing anything the inquisition and sense of distrust would keep me far away from you. In this case, however, we may be pass that stage. It may be something he has been dealing with for quite a while.

You seem emotionally draining and he may have another source for release than simply you. They probably do not speak much but may be beginning to bond. She don't nag him to death...

[Changiis07]

I would let it go and have him come to you if it is something the more you nag or ask the less you'll get so just go on with your day and enjoy it so that he feels more comfotable speaking up if there is something

[Anonymous]

Honestly, that could be s sign of cheating, so be aware of that.

[In_Trance]

Ask him why