Is it me or him ?

So I’ve been seeing this dude since 2018 but we’ve been broken up since July of that year. The sex isn’t bad and sometimes he last but other times it’s like two strokes and he cums. When I give him head he last longer but that’s neither here nor there. I don’t know if I’m overthinking it, he usually wants sex more than me so I’m doubting it’s anything to do with me. Maybe he’s overly excited and can’t control it but idk ?!??