Hello Najwa: I see this is your first post here on PC. Welcome to Psych Central. Since you mentioned the loss of your brother, the Grief & Loss forum here on PC may also be of interest to you. Here's a link:

https://psychcentralforums.com/grief-and-loss/

I don't know as there is a lot I can offer with regard to your concern. I guess the one thing I think I can say is that in every romantic relationship there are compromises that have to be made. And, from what you wrote, it sounds as though there's too little of it in your relationship with this man. It sounds like he just wants everything his way. (Oh, & by the way, I'm not convinced he couldn't break up with this other girl he's been seeing if he genuinely wanted to. That sounds more like an excuse to me.)

Anyway, I don't know who's right & who's wrong in this situation. Perhaps there are pluses & minuses to both points of view. But what does occur to me is that this may simply not be a relationship you'd be well advised to sacrifice for. There just doesn't seem to be a firm foundation for any kind of lasting commitment. Here are links to 5 articles, from Psych Central's archives, that (hopefully) may be of help with putting this situation into perspective:

9 Steps to Better Communication Today

21 Warning Signs of an Emotionally Abusive Relationship

11 Warning Signs of Emotional Abuse in Relationships

5 Warning Signs of Manipulation in Relationships

https://psychcentral.com/blog/6-ways...dium=popular17

And then here's a link to a listing of articles, also from PC's archives, on the subject of coping with grief & loss:

https://psychcentral.com/grief/

I hope you find PC to be of benefit.