My Girlfriend Refuses to Give up Her Other Man

I love this woman and I refuse to let her stay with another man with whom she also has a relationship.

The other man has also refused to give up and allow her to live her life with me.

She is undecided what to do with her life.

I want to get married to her and the other guy wants to do the same.

However, based on how things are going, it seems as if I will have to hold back.

It is really hard to think about not marrying her because I really love her.

It is a difficult scenario.

I do not know how to let her go, because I really want to have a life with her.

She loves me and I love her too. However, she also loves the other guy.

I need some help please thank you.

What's your reaction?