My fiancé and I have been living together for about 8 months. When we first got together his sex drive was average where as mine has always been quite high. I didn't mind compromising at first as I understand that everyone is different and having sex a couple of times a week seemed fair.

But for the past six months he has been wanting sex less and less but also doesn't flirt or kiss me passionately off guard or engage in any sexual activity. We have had our share or stresses the same as everyone but not enough to change his habits.
I've tried everything to reconnect with him; talking, arguing, porn, outfits, asking him what he would like from me- nothing has worked. He is 38 and I am 23 and I feel so unwanted and frustrated as our relationship is perfect apart from the sexual component.

What can I do to boost his libido and have a better sexual connection and a spark?

Sorry- he's 28, not 38