Breathe! You are going to have days like this, i.e., emotions all over the place. It's very normal. Feel the emotions and then let them go. Generally when this happens, it means that you are getting ready to have a little bit of a growth spurt on your journey.
What has thrown you is his comment last evening. They do tend to say things and don't realize how insensitive they are because they are thinking out loud. Sometimes it is their way of taking our temperatures to see if we will react to their comments, other times, well...they are clueless. Let the comment go for now.
You are not a burden to others. I'm sure you have been there for your friends and family and when they have a crisis. You are a very special individual who requires some TLC during this time. Call your close friend after therapy and have lunch w/her or meet up w/her this evening.
Take care of yourself. Pamper yourself a bit because you've had an emotional ride today.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
