Is he bored or lazy?

So truthfully me and my bf dont have sex as often as we use to. Honestly I'm lucky if we do it 1-2 times a week. We have both gained weight since we have been together for almost 8 years now. I also dont have a craving for it as often so this is a first time in a long time we have had sex 3 nights in a row. I'm very insecure about my body since weight gain so I dont like to be on top anymore but anyway heres the thing 1st night I was on top. 2nd night i gave him oral to completion so i didnt recieved anything. 3rd night I gave him a little oral then jump on top because he just Laid there seemed like he wasnt going to put in any effort. Lately when we penetrate he doesn't give me any type of foreplay anymore beforehand. We love eachother to death and I know it's nothing serious on his end I'm just not sure if he has also lost his sex drive or?.....