I was always one to think I had a very open mind in this regard. However, now that I am receptive to dating again, I'm realizing that I'm a little intimidated by the age dynamics involved in the women I'm attracting and am attracted to.
Seriously, if you have a problem of over-thinking a situation, try to find a distraction. Do something different, take a walk, watch a child or a bird, anything - sometimes by observing something totally off topic, it shows us something about our situation.
I know this sounds very trite, but human life is short and to be lived fully. Enjoy your attraction, it could be fun and rewarding.