Most relationships have some sort of age gap. After all, not everyone can be born on the same day. Over the years, though, the average age gap between couples has been shrinking. Married heterosexual couples are increasingly closer in age, with an average of 2.2 years between partners, according to Pew Research Center. Samira Rosenfeld, a senior psychology major, is in an age-gap relationship. “If I had been any older, it would have been a big n…