Can physical intimacy affect the emotional connection?

Hello doctor,

I have had two previous relationships, and in both cases, I was let down by my partners. Despite my past experiences, I decided to go ahead with an arranged marriage as per my parents' wishes. I met a girl on a matrimonial site, and after getting to know her, I fell in love with her. Unfortunately, our parents discovered that we were from different castes (which the girl had kept hidden from me), and they called off the marriage. However, we chose to continue our relationship.

After three to four months, the girl disclosed, in an unavoidable situation, that she had been married before and had a child. I was devastated, but she helped me cope, and I found it difficult to let go because I had become deeply attached to her. Now, we spend every day together, and I cannot imagine life without her. I was willing to make compromises, but recently I learned that she is also involved with another man (though I am the primary one), and she has even accepted a marriage proposal from him while maintaining communication with him. Seeing all of this has left me feeling like I am in a terrible situation. I know I should leave her; I should have ended this relationship, but I am unable to do so. I am trying my best, but despite everything, I cannot stop loving her, and I believe she knows this too. I want to end the relationship, but I cannot. Please help me find a way to do it on my own because no one at home knows anything about this.

Thank you.