It should be: I would like to thank my partner, Alex, who has always been on my side.

Trip is a journey somewhere. Excursion is like a short day-trip. A tour to me is when a guide takes you through a particular place.

The latter seems like they just skip the lectures and take the test at the end. Full-time means that you’re taking the required amount of credits during the semester.

Definitely more informal. I would say "What do you think about this?" or "What is your option?"

So many meanings depending on context, that is why phrasal verbs can be difficult to learn

Personally I really enjoy "take off." You can say "the business is taking off," like it's becoming more and more successful. Also means for a plane to leave the airport and to remove your clothes. Got to love English :D

Love makes people brave, powerful, and blind. It also impacts people's mood. As I grow up, I continue to understand that love takes a lot of time to manage the relationship between two people. Don't deprive yourself of it.

I hope my corrections help!