I know exactly what you mean

We think it’s helpful to say, ‘I know exactly what you mean, I went through something similar…’ but that’s you talking about your own feelings, rather than allowing your friend to tell you what it’s like for them. When a person wants to express their pain, your experiences aren’t relevant to them. A similar, common mistake is to leap to offer advice before being asked. Giving advice is not listening, and often it’s not helpful. It shuts people down. If you feel a responsibility to fix your friend’s problems, relinquish it.

Moya Sarner writing in The Guardian