Assalamu alaikum wa rahmatulahi wa barakatuh brother,

 

Ultimately it will be your choice how you choose to move forward with this situation, but please consider some important things as you do so.

 

Even though you have developed feelings for her and understandably as a result don’t have a desire to marry anyone else but her, it is important to recognise that your feelings for one another have developed and are being maintained in a way that is not congruent with Islamic values that do not encourage such intimate interactions between a man and woman outside of marriage. It is these feelings that prevent you from having any desire to marry any other. To start a relationship in this way does not pave the way for a future together that is within the boundaries of Islam which is somewhat concerning.

 

Whilst she is not formally married to this other man she is therefore not tied to him and is free to walk away, however, for you to do anything to stand in the way of this potential marriage will see you interfering and could cause difficulties for her and her family. So, consider how you standing in the way could effect things for her.

 

Also, as a man, try to be empathic for the feelings of her current fiancé. How would you feel if the person you were set to marry showed no interest in you and spent all night talking to another man? Also, consider how such late night conversations with her will be impacting on her ability to develop any kind of relationship with him. This will inevitably lead to difficulties between them as she is giving all her time to you and not him which might explain why things are not working between them.

 

Whichever route you take, I would encourage you to cut any contact  with her for now aside from that which is necessary for work purposes as you can see how this has lead to the development of intense feelings.

 

If you decide to try and take things forward, make sure to do this in the correct manner. Seek a proposal through her mahram.

 

If you choose to move on then be confident that there are plenty of other good women out there to marry. Women who, with time, you will develop these same intimate feelings for. Starting a marriage in a correct way with whoever it may be provides the ideal start to marriage in a way that is compliant with the Islamic approach and therefore  more pleasing to Allah and more rewarding for you.

 

As you consider these things make istikhara that Allah will support you and guide you to make the best choice for you and that which will be more pleasing to Him.

 

May Allah guide you on the straight path and grant you a righteous spouse who will be the coolness of your eyes in this life and the next.