You're welcome.

Like others have said just start eating more at meal time and snacking when you can.
The is no magic pill or food or method that will make you fat that is up to you and you have to achieve it on your own.
Its not as easy as you think it might be you really have to work at it and it takes time.
It took me close to 8 years to go from 115 to 300 lbs.

Got into all this stuff 30 years ago and still to this day its just a theory with very little actual facts to base anything on.
Are there mysteries in the world? Sure and we will probably never figure them out.

I would rate Wendy's as fair but nothing to get excited about.
Their food is OK if nothing else is open.
The chili isn't bad.
The spicy chicken sandwich is outstanding.

Have you ever lived on your own or had a real job?
What if your parents decide that you should move out and live on your own?
Kind of mean of you to force your parents to take care of you when you should be on your own at your age.
I know that sounds mean of me to say that but your parents deserve" their time". They raised you now its time for you to be on your own and responsible for yourself.

OK

Why take a medication if you don't have to?
Most meds have nasty side effects.

I have dated fit guys and big guys and I like both.
Contrast I do like I will admit but I also like to be with a guy bigger and quite a bit taller than me. There again is the contrast thing.

Everybody is different so what works for one person may not work the same for another person.

A test gain yes just to see what you think is a good plan.