sex drive

So my bf of 7months has yet to last a decent amount of time in bed. we have sex somewhat regularly and in the beginning I thought it was just bc he hadn’t had sex in awhile which is understandable but now we’ve been together for awhile and he still finishes pretty quick and I don’t know how to help make him last longer. An tbh it’s frustrating cause I never finish and when I ask him to go again or finish me off he just says he’s too tired and plays video games or goes on his phone or just goes straight to bed an I just sit there hoping the feeling will pass. Like I absolutely love this boy and he could be something special but like this is starting to get to me. Any advice?