About realationships?

I have been with my boyfriend for 5 years, but lately...I've been feeling like we aren't connecting enough. But I think I am just worrying about nothing. We talk often, we spend time together and we have a great realationship...but, it seems like I get upset over small things. If he is in a certain mood that I don't like, or he is acting strange...or he is engrossing in something all day long, and he doesn't do usual things like hug me often or ect...I feel like I'm doing something wrong, or our realationship is drifting apart. It has felt like that lately, and I don't know why. I'm crazy about him, he's crazy for me. We share everthing together, but is it just because he's had alot on his mind, or he's busy? Couples do things apart, they have different interests, and just because they aren't always conversing or sharing things, doesn't mean they aren't still in love and have a good realationship, right? I just feel lost under these feelings, I just think we need some time out of the house, alone, talking, rekindling things more deeply. What do you think of the situation and how I feel? Why do I feel this way? I know it sound clingy, so please don't answer that way, what should I do to change how I feel. Thanks so much in advance, please, be kind.