Lucy,
When my ex girlfriend dumped about 2 months ago the first thing I wanted to do was to try and get things back to normal. That was a huge mistake and I ended up hurting myself in the process. If you are willing, forgive him but if you think that spending time would negatively affect your emotions and well being, don’t. You don’t owe this person anything and it’s not worth getting hurt over if you think that will happen. On the other hand if you can be friends with this person and be happy, I encourage you to do so. It’s clear that he’s giving you the power here, so use it to your advantage, I hope this helps! Good luck!
Brian