Feeling alone, and bored with DH.

When my husband and I first started dating, everything was great. We went out, had fun, did the bd almost every other day but since we've been married boy have things changed! 
​I feel like we are an old married couple (I'm 26, DH is 29) we barely go out, he's always tired, and sex is, well, boring. There's no spice! We have recently started TTC but I don't share any of my details with him, for fear of putting him off, but damn, IM BORED! 
​I love my husband. He's a great man, and I know he would neve do anything to hurt me, just lately I feel like we are in two separate worlds. What do you ladies do to keep your relationship lively? I feel as if all we do is sit around and watch tv together. DH used to go to the gym nearly every day but that has stopped as well. 
​Anyone else experiencing this? What did you do? What can I do?!