Spicing things up.

Lately I haven't been feeling as "sexy" or anything towards my partner. He tells me constantly I'm beautiful and everything to reassure me but I can't help but think it. Also when it comes to being intimate with each other it isn't as passionate as before. We have been together with each other for 5 years now so obviously we are beyond comfortable with each other. I want to do something that spice things up in the bedroom and also help with myself feeling "sexy" cause I miss that. Before people say anything. My guy is completely open to things if I want to do them and he would say I have nothing to worry about and is complete reassuming me of how gorgeous I am and everything but it's not the same as having a girl's opinion cause he wouldn't really get what I'm trying to say cause it's from a different point of view. So I'm asking you if you all can help a sister and give me some advice/ideas?