After dating for more than two years, my boyfriend told me today that he felt sorry for these years. What do you mean?

Look on the bright side. Don't be so sensitive that you feel sorry when you hear it. Both parties in love should trust each other, although trust cannot be blind or suspicious. It is estimated that when he said "I'm sorry for you these years", he meant that you were lovesick and owed you. This is a sign of caring for you. If you are cheating, you can look for clues elsewhere, but don't make yourself uncomfortable because of one sentence.