Yes, in my previous jobs, I've had multiple times where there has been one or another co-worker that I've had a bad experience with, whether it was just the lack of communication from them or simple as them grabbing something from the fridge that was supposed to be my lunch and they grabbed it and ate it. The way I have solved those was that I talked calmly to them, I explained my point of the situation and I asked them to either communicate a little more with me and if they needed help with that, I would be willing to help them and reach out with them more often and with the food, I asked them to not eat the food and then I put names on all of my stuff that I brought in so that they knew it was mine and that resolved most of the situations.