I have this problem, too.
I also have a new friend who is very extroverted. Thus, she wants to visit me and stay at my house for a few days each week (feel free to scream out loud in horror... I did). For awhile, I would not go #2 until she left my house. LOL I'd literally hold it in for days until she went back home, then I'd make a mad dash for the bathroom.
Fortunately, I am now becoming very close to her and see her as more of a sister now. She loves my AS quirkiness! She thinks it is endearing. Ha! She even guards public restrooms for me while I go do what I need to go do! WOO! I can also tinkle in front of her like if she is brushing her teeth in the bathroom. Maybe soon I can poo in front of her.
*crosses fingers that she doesn't wreck this friendship*
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"Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure. We ask ourselves, Who am I to be brilliant, gorgeous, talented, fabulous? Actually, who are you not to be?"