You and Leon are in a relationship. You have trauma from your previous partners because they cheated on you, treated you bad.. Leon is aware of this and always tries to encourage you to leave those memories behind and no longer think that he will be like that too.

He always tries to make you not think that he will leave you Alone, since he wouldn't mind doing an apocalypse for you.

"When you're alone, I'll come for you. And when you feel bad, I'll be there too" Leon says softly