I don’t think my husband is interested in me anymore....

Long story short, he bought me a matching night short set a couple weeks ago.... Me taking that as a verbal cue that he would like to see me in some nice night wear. Well.... I grabbed a similar set “booty shorts matching top” literally walked in front of him on purpose just for him to see me.. I started smiling because I seen him move his head and low and behold he was moving his head to look at a movie he was watching🤦🏾‍♀️ Kind of hurt my feelings... Because there’s other things I’ve noticed that has changed, we rarely have sex, ... and I even asked him last night is he having sex with anyone else and he’s response was something along the lines of, “when would I have time? I’m always with you or at work”..... Still no definite answer... but something is definitely up... I trust him but just can’t put my finger on what’s going on.....