There are several issues to consider in this situation.
First, it is unlikely that you can't leave him. It is more likely that you do not want to leave him or are frightened to leave him. Second, the general tone of your original post sounds like it would be difficult for this relationship to be maintained for a long period of time, and asking about the positive aspects of the relationship does not seem to have the same depth of positive energy to offset the amount of negative energy in the first post. Obviously, this is a very short representation of the relationship, so it is impossible to draw substantive conclusions, but the initial impression is that the negative energy far outweighs the positive energy.
There are two levels at which this situation should be addressed. It will probably help you to seek individual counseling. This counseling can help you to gain confidence in yourself and to support you as you address the issues that are present in your relationship with your fiance. If you have to struggle with deciding how much to compromise for this relationship or whether to seriously consider ending the relationship, counseling can support you through these difficult issues.
As for the relationship with your fiance, you need to be able to stand up for what you want in the relationship. Only you can decide what is important to you (although the counseling that I noted above can help you to decide what is important to you). Some desires for the relationship are obviously going to be more or less important to you compared to others. It is appropriate and necessary for some level of compromise, particularly for the things that are less important to you. However, there has to ultimately be a willingness to terminate the relationship if your needs and desires are not met, or at least considered in determining a compromise course of action. Every couple has to work out their dynamics of how they resolve differences of opinion or reach compromises, but if every issue is resolved how he wants it, then it is unusual for the relationship to be fulfilling for you. Most couples are able to resolve these issues among themselves, but some couples will do better with marriage counseling.
So, the first thing that would be reasonable would be for you to seek individual counseling, and then with the support of this counseling, then you can discuss that larger issues with your fiance.