Dream about buying sandwiches is a signal for grief, sorrow and regrets. You tend to leave others no choices. You may be holding in your anger and frustrations, instead of expressing it. This unfortunately draws attention to a lost in status. You have said something that has offended someone.
Buying sandwiches dream is sadly a warning signal for some hidden knowledge or some latent talent which you have failed to recognize. You need to proceed with caution in some endeavor. You may be trying to rush through things. This dream is an admonition for illness and loss. You are on a set path and are unable to veer off course.
If you dreamt about buying sandwiches:
You perhaps realized a while back that it is time to move on as far as a current relationship is concerned, because the spark may be missing and you seem to have very little in common right now. However, this is as good a time as any to begin.