Having a hard time 😢

So me and my fiancé have been together for 4 years. He has always been lovey dovey but here resently he has been showing no affection it seems like. I ask him if everything is okay and he says that everything is perfectly fine. I just have a feeling that something is going on and he won't tell me. I have been needing his affection and love for over a week now and it's driving me insane. Also I feel like I've been trying to talk to him about it too much. I feel like I'm being a annoying. I've been giving him space hoping that that will work but it hasn't. Am I just over thinking things?? I've been feeling so down here lately 😢😢😢