Could he be cheating

3va
My bf has always been the type to have sex need a day to rest and go back at it again a day or two later which I was fine with it since I am basically the same way or even sometimes when his work pick ups we go weeks without nothing because he is so tired which I understand this was our normal. Well we have been together for almost 5 years and recently he wants it everyday or sometimes twice a day which is not like him I have questioned him about it and even joked about what are u taking he just says its me I turn him on or what I'm wearing but I feel something else is up am I over thinking it could it just be a boost in his sex drive or is something up ?