to feel positive about one aspect of something and negative about another( Typically: get ~; have ~; give someone ~)
I have mixed feelings about John. Sometimes I think he likes me other times I don’t.
The technical phrase for mixed feelings is cognitive dissonance, as used by psychologists. This is the mental state or attitude of having contradictory or opposing desires, wants, needs, thoughts, etc.
*The worst kind of mixed feelings one can experience is with someone who they have strong affection for, but that person behaves contrarily towards the other person's desires,wants, needs, thoughts, etc. This leaves the person in an extremely tough situation of constant emotional distress, not knowing of whether to stick with the other person or to leave.*
Person 1: Man, I just don't know what to do, or what I want to do. I mean, I really like her, it just doesn't ever continue on with her side. I keep getting shot down. The feelings I have from her are just from me.
Person 2: Looks like a case of mixed feelings. You need to find some else, someone that cares about how you feel.