Maybe you can find a smaller dog at the park and introduce them. I had a friend in a similar situation and she quickly made friends with a lady who frequented the same park. They would meet twice a week and the two dogs soon became good buddies. After that, my friends dog didn't seem to mind socializing with the others. It just took a little patience and time. My friend would introduce her furbaby to the others, one at a time. You could even try play dates at each others home. Don't give up, because it will be fine.
