insinuate (oneself) into (something)
To gradually, often stealthily, become involved in some group or thing. The boss is starting to wonder if an undercover cop has insinuated himself into our group. Geez, would you quit trying to insinuate yourself into all aspects of my life?
insinuate oneself into something
to work oneself into a group or situation. She had sought for years to insinuate herself into Terry's organization. Must you always insinuate yourself into my set of friends?