This sounds a little like circle living that L taught me. You have your core-self as the center circle which is who a person is: beliefs, morals, etc. Then the next outer circle is thoughts, feelings and actions. Your thoughts, feelings and actions do not make you who you are. I don't think you're rationalizing away your feelings per se. I think you might be practicing circle living. You can see that a person's thoughts, feelings, and actions don't make them who they are. I can do that with my parents too. They went through child abuse growing up. They tried to do better with their children, but imo they failed with all 3 of us. However, they are not bad people. Their core is good.

I think your issue is you're combining your own self-core with others. You mention you feel your feelings are silly. You're reacting to their thoughts, feelings, and actions as a reflection of yourself. You're allowed your own thoughts and feelings without sacrificing them for the other person.

Also remember that feelings are not bad. Feelings shows you how the environment or situation feels to you. They are healthy, all the range: anger, hurt, sadness, jealousy, joy, etc. You don't need to put yourself down for how you feel. And it's good to express them as well as your needs (I'm learning this right now in my therapy).

So I don't think your "rationalizing" is all "bad" and definitely not silly. If you feel it's a problem, definitely bring it up to your T. You can explore with your T these feelings you have about rationalization.

One more thing: maybe you feel like you're forgiving a person too quickly. Remember forgiveness is more about you than the other person. Forgiveness allows you to move on. Again, you can process this with your T.

Also, maybe you have underlying feelings that scare you, so you push them down.

Sorry for the unorganized thoughts. It's 2am here and I was just kind of going with the flow of my thought process.