Does anyone else believe in the concept of twin flames or twin souls (a.k.a. perfect soulmates)?

well i believe in this concept.. i have/had two people.. one is my mom.. she understands me so well and comforts me... we don't ever need words.. i am 21 and love her... and second was my fiancee... well we would have married but he met with an accident... and now i feel half my soul taken up.. it has killed me as a person... i am no more my own self... it has killed me...