I would save to a flash drive.
Certainly in 18 years there are pics in there that have nothing to do with him. And while yo think you may not want to revisit - 18 years is a really long time of life to just delete. Sounds like you aren't ready to go through them. I can't say whether you should give to him or not I am not sure what the relationship is. That's something you can also decide to do later as well.