Is relationship worthwhile?

I believe you are wise to question this relationship. From your comments it appears that your boyfriend is emotionally unavailable to you. It concerns me that you have been in a relationship for four years without your needs being addressed. That is, your need to feel loved and wanted. You didn't mention your relationships with your own family but I'm wondering if you grew up in a family in which your emotional needs were also not met. If so, it's not uncommon for a person brought up in such an environment to be drawn to someone with whom they can recreate the emotionally deprived climate of their growing up years.

When our childhood experiences are particularly painful, we are often unconsciously compelled to recreate similar situations throughout our lives, in an attempt to gain mastery over them. For example, if you needed a parent who did not respond to you, you could become involved with a similar person, or a series of them, in adulthood in an attempt to "win" the old struggle to be loved. Because you were never able to change your parent(s) into the warm, loving parent(s) you longed for, you respond deeply to the familiar type of emotionally unavailable man whom you can again try to change, through your love.

Unfortunately no matter how hard you try, you can't change the other person. You can only change yourself. If your boyfriend agrees to it, you could try couples counseling to help clarify all the issues you are dealing with. You state that your boyfriend is good to you because he supports you economically. You need to decide if this economic support outweighs your emotional needs. Ultimately I believe you'll be much happier in your relationships if you give priority to your emotional needs.