Quick nut

So when i started dating this guy we had sex like allllllll the time many times a day and he would last a good but but now its like we have sex maybe once every other day and it last MAYBE four or five minutes I cant complain cause i tend to be a minute man myself but sometimes i want rough sex that last awhile.... Could this mean that he is just trying to get it over with or what??

Idk if i should just be like well damn thats crap or if i should feel like its a compliment?? He said he cant help it but idk...