No one has, or ever will fully master life. We are all here trying to make it through, as best as possible, for Believers (myself included), relying on the help of the Lord.
Because of this fact, and merely being human, we are bound to make mistakes and hurt others. Unfortunately, sometimes the “others” are those we greatly care for. In these instances, we may get the urge to beg for forgiveness. Although I am a firm believer in apologizing and doing all that you can to get things right with others, I think it harmful to your health and esteem, to beg and beg for others to try and see things your way (your well intentions), accept your apology, and let you back in their life (rebuild the relationship).
If you have done all that you can, i.e., apologized sincerely, made necessary mindset and actionable changes to back up your apology, you may just need to let go, and let God. Let God heal you, and let God heal the other person/parties involved.
It is not healthy to continually wallow in regret and belittle yourself, in the process of trying to convince someone to believe that you genuinely are for them. No matter how sincere you are, some things can only be revealed by the Lord Himself.
If you find yourself on the begging for forgiveness / another chance boat, get things right, as much as is possible with you, and then get off that thing! Your actions and true intentions are sure to eventually shine through – Hand the issue/relationship/whatever, over to God and trust that He can and will work things together for your good.
Again, ask for forgiveness, get it right (as much as possible), and hand it over to Jesus.
To you, and to myself I say, never beg.
Holding on – I pray the same for you!