For me, playing Pokémon just gives me a serious rush, a thrill. Catching a pokémon with my last ball, being in a battle where we're both down to our last pokémon and the match could be decided by the next move and coming out on top, or moments when the pokémon I put all my trust in comes through for me, it is in those moments that I feel alive and I play Pokémon to chase that thrill.
I guess you could send the person a request yourself. If he/she understands it was an accident then everything should work out fine. You could, if you know someone who is friends with that person, ask your friend to send a message to him/her saying that you accidentally clicked on ignore.
Hey PFL (mind if I call you that?), Do you know if Pokememes has spoilers that I don't want to see until I play X or Y? I already know about Sylveon's type, and vs.5 battles, but I don't want to know anything about mega-evos until I play X or Y.