Sex question

Hey guys me and bf have been together for 3 years and have a healthy sex life. Personally I think I’m overthinking but I feel like he’s been lasting longer in bed recently. This isn’t a bad thing, but could it be a me thing?

Could he be getting bored of the sex? I’ve asked him before how he thinks the sex is and he still says great. So although communication is great and necessary, I don’t know if this is completely honest.

What do you guys think? When a guy lasts longer than usual in bed could it be a you prob? It’s been happening for awhile now, but definitely longer than it was when we first started having sex. But nothings changed at all with his personality or the way he treats me.

Let me know what you guys think and if I’m just overthinking