I would honestly cherish that relationship.

It sounds like he could help you.
Everyone has a chance in the world, regardless of how they did in school. I can compare - I did horrible in my sophomore year, possibly due to lack of motivation and issues with bullying. I ended up doing better in my junior and senior years.
It's nice to know you're focusing on your positive qualities. Be sure to do that in the future as well.

Mid-70s isn't bad; it's not like you're failing horribly, like 20s and 30s.
Don't doubt yourself. Like I said, everyone has a chance in the world. It just matters on how you use that chance.