I think that's normal. It probably gets easier as you let go of more anger over time. My soon to be xW did the same thing. At least you are realizing it and working towards correcting that. It's triggered by opening up emotionally and then fearing that you might get hurt. Like for example, 3-4 weeks ago she decided to have sex with me. It was probably the best we've ever had. Very intense and emotional. Guess what, she was having anxiety right after it. The week after she back peddled so fast it was shocking. I don't know if her asking for divorce was the repercussion of that or not.... Just gotta let go of the fear and have faith.... Otherwise you'll just be angry a lot for silly things against your xH. Like my (x)W.
M: 31 W: 31 M: 7 T: 8 S:4 D:2 Bomb dropped: too many to count or remember, 12/17/07 last one S on 9/2/07 W sent off D papers 12/31/07. Me trying to live life and hope she returns one day.