We live in a world that offences are the order of the day. It's now even a culture because people find it difficult to apologize when they are wrong.
So, firstly, you need to ask yourself if it's worth it, being in pain for someone who might have moved on or does not even think about it.
You also need to identify opportunities that this pain might cause you, even your relationship with God which is the ultimate might be affected.
it's also a way of the devil stealing your joy, you deserve to happy.
So, allow your heart forgive so that your joy can be full.
Also, stay away from anything that can bring memories of such experiences
God bless you.