I totally understand where you are coming from. I sometimes feel like I am alone too. My husband is a drill sergeant and he works crazy hours. He has to be at work most of the times by 4:30am and doesn't come back home before 6 or 7 or 8 or 9pm or even midnight, if he gets to come home. His two children live with us and I am the one that takes care of them 24/7, bringing and picking them up from school, feeding them, checking their homework, bringing them to karate and gymnastics and so on and so far. Sometimes it gets really overwhelming especially because I am also a full time student in college and try to get a little bit of money here and there working as a freelance graphic designer and doing photo restoration. And in those days in which he happens to come home early or is miracolously off, I wish he would take care of his kids and worry about picking them up from school and driving them around, giving me a break and time to study. However, I understand he is tired as your husband is too. When he comes home I fist get my daily "BIG HUG" and give him his time to relax, then I try to finally get some grown up time after dealing with the kids all day long, but we often get interrupted because they have their needs too. As some other wifes have suggested, the best alone time is talking laying on the bad because for our family that is where the kids are not allowed to go. They might knock on the door still, but we tell them we are talking and ask quickly what they need. My favorite day is Thursday night because on that night we go to dance class (ballroom and latin) and that is OUR time ALONE! We have also joined a ballroom club which organizes dances once a month and that is another of my favorite days... if we can find a babysitter... It is so helpful to find an activity that both of you enjoy doing and that gives you some time with each other. The only downfall is finding and paying a babysitter when you don't have family close to you and don't swim in money, but it's worth it, because it keeps the relationship strong and alive. My suggestion is that you talk to your husband in an appropriate moment. Don't try to address the problem as soon as he comes in the door. Give him his relaxing time and then try to start a conversation to see if he is willing to turn off the tv and listen to you. Make sure you start with a kind and sweet tone of voice. You could probably start by recognizing and praising his hard work (it will make him feel better and more motivated to listen to what you have to say)and asking him how he likes the job or something similar. Then start saying what you think and tell him your feelings about the situation. Do not accuse him of anything, keep it more on the side of "I wish we had a little more time for each other, I miss the times when we..." At that point you could suggest some kind of plan that would give you some alone time. It seems like with men you have to make them believe that they came up with an idea, so in some way you need to manipulate his mind so that he will come up with the idea of dedicating a specific time for you.
Just as an extra suggestion. There is a really good book out there called The Five Love Languages by Gary Chapman that explains the different ways that people understand and express love and how to make sure that both you and your spouse feel loved. Read it if you have a chance, it is really informative and eye opening.