I see 2 possibilities.

1°) you have a good intuition, and what you feel tells in a way the unavoidable future. If you're young, you may not know yet about that, and by trying again and again to go against that feeling (by fighting for example), you may waste your energy and time. And if so, one day you will have learnt about it and you will stop trying. When it's not intented to work, it won't work, whatever you do. The feeling will become the reality.

2°) you don't have a good intuition and what you feel is a fear. In that case, be very careful because whatever you do consciously will bring you closer and closer to your fears. In a way fears auto-realize themselves, like everything else: joy, luck, love, etc. Situations like this are very fragile and can break easily, and in that situation no help can be brought to you because you're the cause of it, you create the problem.

So, to conclude, you have no choice: be real, know yourself and that will solve 2) without any effort. And if it's 1), then not forcing will have you leave the situation, and that will solve also the problem.

But if you believe that you can do something to “fix” your couple, then that's the beginning of a number of problems that you can't even imagine, it's endless.

So, “I'm not good enough for my boyfriend”, how to fix this problem? The problem is fixed when you realize that the only problem is you, by refusing change, you created it.

Life is change and that is unavailable. So accept that, and maybe you'll stand a chance with him. Otherwise, stick to your idea and you can say goodbye to any happy future together: either the future won't be happy, either it won't be with him.

So accept change, and see that change is good, always.