It most surely does.
This might sound a bit corny, but we still have to think that sex is just another, if not the ultimate, expression of love, and not meant as a replacement for such feelings. If you get depressed because of sex deprivation, then something is terribly wrong with your relationship.
Why do we have to think that?
Let me ask you, do you "feel" something when you masturbate? No, I'm not talking about an orgasm, I'm talking about emotionally. Sex is the same thing; you don't need any emotional connection to fuck someone, you generally just need to be attracted to them, and then pleasure each other.
Don't get me wrong, sex COMPLIMENTS love very well, meaning that the strong emotional connection you have towards someone (love) can feed off your sex and make it even more pleasant, but to the point where sex is merely the ultimate expression of love?
No. Well maybe for you, but if that's the case, I pity you.
Besides, even by your own logic, if sex is the ultimate form of love, and you're currently experiencing sex deprivation, then your partner isn't expressing his "ultimate love" towards you, is he/she? So yes, I guess there is something terribly wrong with your relationship.