Whenever I have sex with my boyfriend when I see him it’s only quickies less than 5 minutes everytime ? ( long distance relationship )

Like there is no build up leading towards it make out session just feeling on me then dry humping then fucking for 5 minutes or less then done and continue doing whatever we were doing before if it’s the first I’m seeing him for like a month then I might get 3 rounds only one the first day it’s getting old I mention it to him but he says he can’t last longer then what he gives to me I don’t think he understands should I get a vibrator or dildo open to suggestions ? Help ..