I am having hard time getting over exfiancee he is now married with child i still and will always love him hlp

I met this great guy when i was 21 he was 20. He took my son in as if he were his own he raised him and then asked me to be his wife... i thought things were good but i found out after the break up had been with a girl for 6 months behind my back. He is now married to her and just had a baby 5 months ago.... I LOVE him with all my heart and soul and he is my soul mate the one that I am to be with ...I just know it.... I am crying ever night thinking of him any advice would be greatly appreciated.