I can't really talk to this person without it coming across as an insult. I believe this person has an ulterior motive and is being fake. I think the suggestion of reading their aura is a good one. I would like to know if there are any spells that can clarify or dispel my instincts.
I am personally of the opinion spells we have written ourselves for ourselves work better.
That said, this site has a copious amount of spells listed, so you could give them a look to guide you.
In the meanwhile, you could try using a protection spell, just in case you are right and this person harbours bad intentions towards you. You could also try doing a cleaning of negative energies before talking to them, to appease the animosity they seem to have towards you.