There are possibilities that you have an issue to trust people. This could be of some past bitter experiences, if so, you need to work on that to overcome such thoughts. I can't say it is normal; we are social animals and we need people around us. It is up to you, what to talk/say and what not to talk/say to your friend, or family members or anyone else; depending on the consequences that you anticipate
Next Steps
Work on your Self Awareness. if needed approach a Counsellor who can help to handle your ownself