Mending a broken bond

My boyfriend and I have known each other going on 4 years but only have officially been dating for 2 years. Anyways me and his family had a great bond. Every holiday I would come over. We vacationed together, everything. I felt more like family to them than just a girlfriend of their son, brother,etc. That relationship has since changed due to events happening. I took an emotional turn for the worse and pretty much reached out for revenge that now is biting me in the butt. My boyfriend and I had a complicated pregnancy, two matter of fact, and I felt like he wasn’t there nor was his family there for me. I felt like they didn’t really care enough for me or the children I was to bring in the world. As the emotional individual I was, I felt empty and wanted them to suffer and feel the pain as I had so I stole funds from his mother, something I regretted since day one. Of course, that was the reason why our “family bond” ceased. Since then, me and my boyfriend have worked through things and seem to be getting on the right track. I want to try building a family again but I don’t want my boyfriend to be stuck in the middle of me and our family and his mother. I wanted to try talking to her to see if it was even a chance of mending the relationship but I just don’t know what to say. HELP!!! I love my boyfriend beyond what words can explain and I love his family, even if the feelings aren’t mutual. I’m just stuck at this point. I allowed the emotional depressed me take over me instead of getting counseling to help cope with the loss.