Overwhelming thoughts

Hey ladies, so I don’t post on here much, but I really need some advice.. someone to tell me I’m not alone maybe? I have been with my guy for a little over 4 years. I’ve noticed that lately, I think something is wrong, like he is distracted from putting his effort into us, even tho nothing has changed. I have more of an urge to check his phone even though we don’t do that kind of stuff.. etc.. last night, I asked him if something was wrong so many times that he ended up asking me to stop asking him bc nothing is wrong, but in my head I really feel like he’s upset with me or not happy with me, but it’s ALL IN MY BRAIN!!! Have any of you ladies had this feeling? Like you felt like you s/o wasn’t happy and kept feeling very sad because of it?.. no matter what they say your mind won’t change