This is a rly tiny issue but it gets me anxious and im not sure what to do about it. Basically, I have dog, 'Tim', but my friends have somehow started to call the dog 'Tom' - Idk where that came from but Im way too nervous to correct them or say anything. Its gotten to a point where they've said it multiple times and ive never said anything, its past the point that its acceptable to correct them and it not be super weird. 

Should I still just try correct them next time or just leave them be? Thanks yall!