Explanation please?

Lexi

I have “been” with a guy since I was 18. I’m about to be 21 and hes about to be 25. Orginally, we had wanted to be fwb, the first few months I had no feelings for him, he made it clear he had feelings for me and wanted more. We stopped talking for three months. Then, we started talking again and after six months, he met my son, he seemed like he really wanted something serious. A few weeks ago I found out he had other girls nudes in his phone and was talking to others, I called him out on it and he said “we arent offical, if you were my real girlfriend I wouldnt have done that”- wtf? We have been sharing the same bed for almost two years, go on dates, travel, he is involved with my son, etc. I also learned that he doesnt count a girl from his past even though they were involved for YEARS simply bc “they werent offical” whatever that means. I feel so dumb, I really didnt think a title meant anything, especially at our age, but I guess I was wrong.