Do dreams mean anything!!!

My aunt passed away a years ago when she did I sometimes had dreams about her,one time; it was summer and my family were going to europe, so it was accuple of days before we were leaving,I had a dream about her I was in the airport getting on the plane she was there she followed me but not in a scary way but in a way as if she didnt want me to go at the end she held my hand it felt so real just like when she used to pick me up from school when I was little. My teacher once mentioned that it all depends on how you saw it in your dream like if it was in black and white it ment something different then as if it were in color. So I dont know if it was just a dream or if it was trying to tell me something. (I remember this one time we were sitting in the driveway,we were waiting for my cousins to come back from school.I had my drawing book with me cause everyone thought that I was going to become a future artist lol I remember sitting next to her and I showed her all my pitcures and she loved them and then I drew a horse and she watched me the whole time as I drew it she said that was her favorite picture out of the whole book. I still have that pitcure. But now about 3 years have gone by and thats the only thing I remember and her laugh when ever she laughed everyone laughed along with her.)