Am I overreacting?

I recently found out the in the beginning of the relationship with my boyfriend (of 3 years) he was texting and hinting on multiple other girls. Some that I know for certain had a crush on him and that he fancied back. I confronted him in tears about it and he said that he didn’t really see what the big deal was since at that time he didn’t really see us as a couple. It’s been a couple months since that talk and till this day I still think about how he was talking to those girls while we were “dating” I’ve been an emotional wreck and he doesn’t seem like he really cares all that much. Am I crazy for feeling this way? What should I do?
Am I overreacting?
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