What do you have to say about the rest of my post though?
Sure I agree that feeling happiness may carry some undertones of fear or disappointment or other negative associations, but those tend to come as afterthoughts that float in. There are still moments of feeling emotion where they can be quite pure. I would say that an emotion that has this counterweight to it is not the emotion in its fullest state.
I didn't say anything about our 'true self' in the case of emotions, so that's irrelevant.