I think you should continue on your path of evolution. At the same time you need set yourself written goals in the appropriate way. You need to add visualisation to this. Get yourself into a quiet place and then make a mental film of your family happy together with you. Rehearse this movie once or twice a day. You add all positive scenes which have been the best part of your lost relationship. As you keep changing, your girlfriend will eventually notice something in you she will find irresistible and, hopefully, that will trigger to let go of past bad memories.

Which programs are you currently using?