Worm yourself into
Definition 1 of 1
Pro Tip 1/3Sneaky Progression
The phrase implies a sly and gradual approach to becoming part of a group or situation. 
Despite his quiet demeanor, he managed to worm himself into the in-crowd.
Pro Tip 2/3Persistence Matters
This expression often highlights the persistent effort taken to be accepted into a certain circle. 
He was diligent and, over time, wormed himself into the manager's favor.
Pro Tip 3/3Subtle Intimacy
The phrase can suggest building a relationship in a subtle, indirect way, winning someone's affection or trust. 
She wormed herself into his heart by being attentive and caring.