Buyer's agent buys a listing I was looking at

[Matt Qi]

it turns out the realtor I have been using to look for houses was looking for the same exact criteria for a house he wanted to purchase personally.  A house popped up that I wanted to look at and the realtor told me a bunch of reasons to not go see it.  I later find out that was because he wanted and did purchase it.  Is there something against this as they did not have my best interests in mind?