Not all dreams are meaningful as sometimes dreams reflect your thoughts or matters or worries etc. Dreams seen during wrong time of sleeping ( e,g. between Fajr and sunrise and between Asr and Maghrib etc) have no value.
Seeing your relatives in the dream does not mean that they miss you nor want you with them, rather reminding you to do more good deeds for them. Deceased relatives expect from us to help them as the Hadeeth says: Have mercy on your deceased beloved ones by giving charity on their behalf إرحموا موتاكم بالصدقة
Wassalam.