You are 20 and still have plenty of time.

Don't be in a relationship that stresses you out.

Also, relationships aren't always equal like that. Some days we have to help our partner more. They might get sick, and a good partner would help. One might be in a financial struggle for some time and need help. Some days, we just have bad days and need someone to care. Sometimes you have to give a little more to the other, and some days they have to give a little more to you. I understand wanting to split things like bills, taking turns paying every date night, taking turns getting food, but it sounds like this is a little more than that.

Regardless, if the relationship is stressing you out, don't be in it. I think his actions and behavior is something to think about--what if you get sick? Would he bring you soup? Help nurse you? Or would he note, because he hasn't been sick yet and received that same treatment?