Why do I feel lazy to fix myself up?

I love looking nice. Fixing my hair and applying makeup on. I get alot of compliments when Iam fixed up, but sometimes I don't feel the need to do anything. I get lazy. I Shower every day but I let my hair air dry and I usually won't straighten it unless I'm going out to look nice ( like a night out or a family event) So if I'm going to the store real quick or going shopping I normally just shower, get dressed and leave. This all would be fine except that my hair poofs up when it dries naturally so I look dirty unless my hair is straightened. When I'm at home I dont fix myself up and am not usually dressed to go out (basketball shorts, simple tank top) so if someone happens to stop by I look trashy. I notice that if I go out I always run into people and they always look nice! I feel embarrassed! And if I have ever stopped by at a friends house they always look decent! I don't do my hair unless it's absolutely necessary cuz it damages easily so I think about the concequences and dont do anything to it. What are ways to motivate myself to just straighten it anyways? Why does everyone else look good all the time?