This shows that you are:
a. being respectful of them
b. acknowledging them as an equal (because that's what they are)
c. treating them the same way you treat your other friends or peers
This makes the other person feel bad about themselves, and it says a lot about your character. Remember that everyone is different, and just because their difference(s) might be more obvious to you, doesn't mean that you should treat them as anything less than another person.
If the two of you are okay with it, go ahead and give them a hug. This is a common greeting amongst friends and hugs almost always make everything better
Once the two of you have become familiar with each other, you might want to start hanging out with them outside of wherever the two of you met. A popular option on campus is Southside. Sooooooo
This might sound silly, but if you are someone who has not been around another person with a disability before, you may feel nervous. And that's okay! Try to focus on what the two of you have in common vs what makes you different. (And keep those nerves under control. No food fights allowed!)
They're your friend! (Or they will be if you follow these instructions) So don't be nervous. You got this, I believe in you.
Salad is the most important meal of the day, and talking with a good friend always makes a meal taste better. Make conversation. And if you're too awkward to make conversation, show them your favorite memes. That's always a great way to bond.
I know the two of you had a great time *cough* thanks to me *cough* and you never wanted it to end, but hopefully the two of you exchanged contact information. Now you can ask to hang out whenever.
Thanks to this fantastic article you have now earned yourself a new friend. Congratulations!