based on what you have shared with us over time you are most certainly NOT alien weird. Okay?
Age isn't the factor here. You're doing intensive healing work and in school in addition to being the primary caretaker for your brother as he is receiving treatment. Your plate is full and to worry yourself about this just adds to it without need.
I hate to sound crusty old with things like all things in time.....but there is truth to that statement.
Instead of feeling badly about this try to remember all the positive things you are accomplishing and getting back in your life through the therapeutic work you are doing.
Keep at it you non alien non weirdo you!