juice box

What up guys ...Question for people who lift alone and like it ? I have lifted by myself before but dont like it I feel like am not lifting as hard when am ridin solo feels like I take to long in between sets and lifting too light . I have a workout partner but he just went to jail crazy story lol....... But my question to the people who are ridin solo in the gym killing it how do you keep the workout hard and the weights heavy . ( Question is how do you get the same hardcore workout solo ...