I don’t feel attractive anymore.

 I’ve been with my boyfriend for 7 months now and i love him with all my heart. The thing is i have been under alot of stress with my daughter behaving badly and the house being a mess that i need to sort out and i’ve let things slip away with my boyfriend. i haven’t been wanting sex much but when  i want it, i hardly get it. My boyfriend says he feels like he’s in his 40’s and married for years and didn’t really want sex much anymore and i don’t know why he feels like this, i feel so lonely because he turned me down tonight. what can i do about this? i really want to spice things up esp as my daughter is away. x