Sex...downhill

I love sex, i love the passion the intimacy the excitement but it like my boyfriend treats it like a chore now.. Makes me feel unattractive. Yes we both have jobs n i feel like hes not into it. We maybe have sex 3 times a month i have voiced this issue to him alot i have made the first moves, bought sexy lingerie he seems to have lost interest... N quite frankly has made it boring. Im 30 hes 23 is there something wrong with me? Any one else experience this