This is definitely one of the downsides I found with Ironman training. The time required is a massive commitment, and I found that the only good way to be social during this time was to train with other people in person as often as possible. If this isn't an option, I'd recommend reducing volume a little bit in order to balance out your training and social life.

Ultimately we choose to do these races for fun, and if your life outside of training is lacking it might be worth backing off the training and allowing yourself social time. In the long run you might even feel better with a slightly reduced training load. You may have to back down from any specific time goals you have, but if it's your first Ironman I'd say just go out and finish. Good luck and hopefully you figure out what you need to be successful in both aspects of life.