Someone from past life appears in my dream
 

And i cannot forget them. I just really want to find them. I dont know or think it is a love thing. Just someone who was important in my past life.

I can relate to that feeling, pinkkarma.
Not a love thing? But it is! Just not of of the romantic sort. More like you would love a close relative or close friend.
Hope you will find them.
For me, there are some people I dearly miss, too.

How can others help you? What characteristics would the person you are looking for have? If you could provide a general description of their personality, it could increase the chance that this person finds you. Or maybe, if you remember and that wouldn't reveal too much of what you'd rather keep private, you remember that person's first name? What era and/or country you were living in when you encountered them?
Not asking you to share details of your past life or lives you do not feel comfortable sharing. Wouldn't want to do this either.

I have just had that happen recently to myself as well.