>making them enjoy your presence
You can't "make" someone do anything.
And you certaintly can't "make" a woman "like" you.
All you can do is plant seeds and ensure they get adequate soil and water and sunlight.
And sometimes, but not always, for no reason at all ... they will grow.
P.S. Even God can't make someone love Him. That's why we have Free Will.
>I honestly think this guy has some kind of disorder, some days he tries to be helpful while others he's an obnoxious braggart
That's called being human.
It's normal when women change their minds, and men change their minds too.