I've came to the realisation that I have developed a small crush on someone, someone that I shouldn't have a crush on. The main reason is because I'm in a relationship. The second reason, this person is also in a relationship. I have been with my boyfriend for 4 years and I have never had a crush on anyone before. I pride myself on being a loyal girlfriend, so I feel really guilty, for even feeling the slightest bit of attraction to someone else.