I have been married 30 years and found that nothing will keep your marriage strong than time together. Men need to know that they are your "knight in shining armor," your "stud," your "appreciated provider," and your best friend. If you focus on your alone time at the end of a day, you will find yourself "alone" in your marriage later on, even just emotionally.
Find things to do that are fun and fit both of your needs - some days, go for a bike ride or kayaking. The exercise will produce endorphins (a pick-me-up) and is great for your health! Other days, bring out some wine and cheese and have a date night in front of a movie so you can wind down. Do you like to do puzzles, play cards, or play games? Let him do the planning sometimes and tell him that you would like him to surprise you, so you can see what some of the things are that he enjoys. Going for a walk along a river or bayou is inexpensive or is there a place to hike near you? Do you have a fire pit that you can roast marshmallows for s'mores? My husband loves going for drives. He also LOVES having his feet tickled and rubbed while we watch TV. See what your husband wants to do and make it happen.
After a long day, it is great that he still wants to spend time with you. Let him know that there is no one or nothing that you would rather do than be with him. It is totally worth it! Then on those days that you need to have for yourself, he won't mind as much. Just don't make it sound like whatever you want to do is more fun or desirable than being with him.