I need advice

I’m currently living with my boyfriend and we have been together for almost 6 years now. Lately I’ve noticed him not being very affectionate towards me... he’s not the most affectionate person but lately it just seems like I’m initiating everything except sex, idk of this is how it’s always been or if I’m just now noticing it.what do you guys think I should do? I love him very much and I know he loves me, or at least I think he still does. Do I talk to him about it? If so how would I go about starting that kind of conversation?