1. Sit them down and tell them that you're ready to move on
2. Don't cut them off completely even if you feel like it, it just makes them want you more
4. Be gentle but firm, try not to be too harsh
I know that sometimes you want to be like "JUST LEAVE ME ALONE" but that's not always the best way. If my advice doesn't work (don't judge me, i'm not an expert) then just tell them to "LEAVE YOU ALONE!" :)