Relationship

My husband and I have been together 3 years we got married in June. Lately he's been acting distant and acts like he doesn't want much to do with me. He complains when I try to cuddle up to him and says he's tired and I keep him up. I dunno what to do I just wanna build my walls and not confront it because it turns into an argument and I get upset. I don't wanna lose him but it emotionally straining. Has anybody else gone through this? What seemed to help?