I don't have my sense of smell 90 percent of the time.
What do you mean?
I smell disease coming for me, but smell trouble once a girl has started to like me.
It's good to have even partial sense of smell. You have common sense at least.
Whatever, I can't smell girl on my shirt and I thought she came to my room but I've called her and she's not here! What do I do?
You need to stop worrying about the girl and get your sense of smell checked out. It's nice that you can still smell somewhat however for now.