Ya Never Know

First impressions are not always true. I've recently made an aquaintance with someone who has won over several of my family members. Including myself. Until a few weeks ago. This person lied to me about something that is very serious in my book. Now it seems they are lying about even more serious things. I have lost trust in this person. Was I wrong to trust in the first place? Is this person also lying to my family members? Some who would be extremely hurt if that is the case. I pray this is not true. I pray this is all a huge misunderstanding. But at the same time, my instincts have a track record of being correct. That being said, my guard is most definitely up. Unfortunately.