Are you sure you want a partner who can read your every thought? Also, Guinans got wisdom to doll out for the rest of your life, which will be far shorter than hers, barring unforseen circumstances.
Aw man I gotta turn in my Star Trek fan card, I forgot she was half betazoid. I haven't been able to watch TNG since they moved it from Netflix to Paramount+.
She's described as an empath rather than a telepath but she does display telepathic abilities. I think she's just a weak telepath by betazoid standards and that's why they highlight her abilities as an empath. In Encounter at Farpoint Troi is able to communicate mind to mind with Riker suggesting that with some time and emotional connection at will or continuous mind reading is a possibility for her.