Don’t stay on plan around people

I stay on plan (for the most part) when I am alone, but when I’m around people, I tend to go off. I asked myself “Why do I do that?” Is it underlying anxiety around people? I don’t think so, I don’t feel that. The people I’m with are people I love and want to be around. Is it I just want to eat what they are eating? In other words, do I just want to fit in (in terms of food). I don’t think that’s it, but maybe it is. Do you have any thoughts about this? Is this a typical phenomenon? Any suggestions on how to approach this problem?