I think it can do - if you want it to. I'm assuming by "spark" you mean that you and your other half don't seem to have a romantic, exiting, sexy relationship anymore, and you feel like you've gone off him/her.
There's always the obvious option of going for couples therapy. Maybe you could try going away on a romantic break, if you've got kids, leave them with someone trustworthy and enjoy the fact that it's just the two of you.
thanx 4 your answers, cant go on a break cos we got 2 kids n no one will have them if we go away. we aint been out together 4 over a yr now. been together 7 yrs. it just dont feel like he`s attravted to me anymore