Hi,
My therapist told me that I needed to trust my gut too. If I was uneasy about someone, then there might be a reason for that.
After dealing with my former A, I didn't trust ANYONE including myself. That was a year ago and I have worked really hard to regain trust in myself. Part of that means that I take things slower and listen to my mind and heart (not just follow emotions, but look at things logically).
A big thing I have learned is that I cannot have a relationship with anyone without trust. If I can't trust someone, then I keep my distance.