Yes, you can share your feelings but don’t dwell on them too much.
Observe if by you sharing your feelings whether you are doing any good to yourself or your loved ones. Suppose you are not feeling good and you keep telling your friends that, are they going to help you in anyway?
If you have fever, and you share that with a doctor, he will give you some medication. But if you just keep telling your mother, grandmother and your friends who are not doctors, it is not going to help you in anyway.
Share those feelings that uplift people. Don’t share those feelings for which no one can help you. Share them only with those who can help you, someone elderly or someone you can trust. With them you can share and take guidance.
That is why with a teacher, a guide or a Guru you can share all your feelings.