Feeling Lost

I feel trapped! Found out someone that I have loved all my life betrayed me. I feel like I have to forgive them because I have special needs children involve, but I am hurting. I want to know how to love without being too attached so I can mentally move on. This person is the only person I have had in my life for over a decade, so now I feel lost after what they did. I pray that I am able to forgive, but it's really hard. The person apologized it seemed sincere, as this person never betrayed me before. So how do I move pass this for my own mental health?

Thank you!