I know God forgives for premarital but will others?

i thought that i was going to spend the rest of my life with this one person and had premarital with him and after 3 years he has broken up with me and we no longer speak, a lot of things in my life have changed since then i am back at church and i am rebuilding my relationship with God that i lost for my ex-boyfriend, things are better now and i am a much happier person with Him in my life but i cant stop thinking about this regret i have for having premarital . from my past relationship i have decided to not date someone who doesnt share my beliefs, but what happens when i find this guy who does and he is waiting til marriage..should i tell him i had premarital and risk him never speaking to me again or should i not tell him because i remade that descision to wait and asked God for his forgiveness... i dont know what i should do and how i can stop feeling so guilty about how i did that and how much i wish i could just take it back..i just want to hear others opinions on this especially some from those who are waiting til marriage and what theyd do if they found there partner had premarital