What does it mean when you impose yourself on other people?

It means they're not wanted - yourself and your conversations. See point 3. below:

im·pose [im-pohz] verb, im·posed, im·pos·ing.
verb (used with object)
1. to lay on or set as something to be borne, endured, obeyed, fulfilled, paid, etc.: to impose taxes.
2. to put or set by or as if by authority: to impose one's personal preference on others.
3. to obtrude or thrust (oneself, one's company, etc.) upon others.
4. to pass or palm off fraudulently or deceptively

etc

Lol that would suck.