If you miss someone does it mean you should contact them? ?

only if u have a chance of even being friends. if not. i dont think so. ._. tc. thats the type of tolerance an impatient  girl like u needs

No, why bother? You're clearly not compatible, you're just asking for drama. There's millions of people in this world who you could get along with, stop wasting time on one that you know won't work.

why not, might develop into a good friendship.or a great chance to have a good laugh about the past. I actually have a friend that did that and was not sure they ended up marrying other people and ended up divorcing then like 15 years later met up and fell in love and they thought it would never work but it did.

If you parted on good terms why not just send a message and say hi, catch up with them. If you parted on bad terms try getting in touch and see if you are both still feeling bad about whatever happened,,time can clear the air and see things clearer.