You will absolutely love Alicante! It is an amazing place!
I just got back last week after spending a sememster abroad in Alicante. There are so many things to do there. The beach is nice, and the one in San Juan is gorgeous too (many buses go directly to San Juan, 125 pesetas).
The nightlife is wonderful. First you start off either at the Rambla (Oliver's, Mulligan's, Murphy's) or in the Barrio (too many cool places with cheap drinks to name them all...) Be sure to try the mojito bar!
You have to duck down to get through the door (you'll know what i mean...)
Then after starting the party here, you go to the port. Stop at Potato's or Di Roma's. You will have a blast!
Did u know that Alicante is the so-called shoe capital of Spain? The have matching bags to go with practically every pair!!
Hope u have a wonderful trip. You'll have a great time in Alicante!
Janeen