ingratiate oneself into something
to work hard to bring oneself into the favor of someone. Oh, how he fawns over the guests! Isn't it terrible the way he tries to ingratiate himself into their favor? You will never succeed in ingratiating yourself into my good graces.
ingratiate oneself with someone
to work oneself into someone's favor. Why do you have to ingratiate yourself with everyone? Don't you know how to be just plain friends? She was very obvious in her effort to ingratiate herself with the boss.