Chasing my Best Friend

Best Friend is someone who's always there for you. Best Friend you never expected to reach your world. He's not a typical Best Friend by the way.

Suddenly, my heart beat so fast for him and he has a girlfriend but they split up so my heart was glad and at the same time weeping because I saw him hurting. After that, he was mean to me but I chose to chase him, even he didn't know. Months later I saw that his condition was improving. But, bad news. He was forced to marry his ex-girlfriend. The day before his wedding, he said he didn't love the girl he was going to marry, and he's falling for a new girl.

What if im that girl? but the last time we talked im being fake at him, i hide my true feelings and my true self that day. Should I regret?

Should I continue to chase my best friend?