[header] How to deal with a best friend thief [title] Confront the new friend about what is going on. [step] The best way to deal with this new friend is by talking to them about how they're making you feel. Approach them with confidence and ask if you can talk to them privately about something if other people are around. 
[substeps] If you've told a teacher or parent about the situation, they might be able to help you set up a time and place to have a discussion. If not, you can ask to talk to them one-on-one whenever they're free.