@Tersione
"Look how I faked acting like your dead friend as an ghost and brought the same type of dog you had that died! Haha ha it's just a prank bro" Yea no, who would go at those lengths to prank a girl.
@Echonic I was only referring to him texting her when I was talking about it being a cruel prank. As for them appearing on photos (if they actually can), unless she's pretty into occult or supernatural stuff, I would imagine that them being actually real would be the last explanation she would accept unless more undeniable evidence comes forward. People usually try to rationalize weird stuff happening as best as they can.
@Tersione
I can kinda imagine that. But if the ghost tried it's best to prove it exists, like texting her, lifting up items in front of her, etc. she'll probably start believing in no time.