Do you know that you will be seeing the same therapist? Even if you do, you can explain now, in real time, that it was a money issue and apologize for being rude at that time in the past. Therapists know money is an issue for most people! They will not be embarrassed that they have to charge so much nor that you did not come back when you had not yet invested very much in therapy; neither you nor the therapist had gotten to know one another yet so there was not much of an expectation/disappointment there that you did not come back, just a social nuisance factor of not coming back when you said you would. I think some of the embarrassment is yours/in your head about your actions and not necessarily what the therapist/other person feels about the situation. Be curious enough to find out what they think? Go ask them?