I'm Betrayed by My Childhood Friend Who is Also My Lover, but My Other Childhood Friend Healed Me, So I Feel Like I Can Recover and Be Happy ~Is it True That Friendship Between a Man and Woman is Impossible?

I’m betrayed by my beloved girlfriend who is also my childhood friend.
Then, my other childhood friend watches over me and cares for me when I’m hurting.
However, to make matters worse, a senior of mine schemes to take everything away from me.
A story of salvation that begins with betrayal.