Why would a guy live with a girl for 5+ years and be in a relationship for 5 years if he doesn't love her?

I recently broke up with my boyfriend in 2021. We recently talked and he told me that he was never in love with me he just had love for me. He felt that he was forcing himself to do things and feel things and it just wasn't happening. He said I was a good person and he was attracted to that. We lived together for 4 years and I had became close to his family, I saw him cry once and he opened up to me about hard things in his past. He would say I love you so I thought he was in love. It hurt to hear him say how he really felt and I felt played. Why would a man do things or come off as if he is in love but truly he isn't. Maybe there were signs that he didn't love me but I was in denial? Was he just lonely, settling?

Why would a guy live with a girl for 5+ years and be in a relationship for 5 years if he doesn't love her?
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