i feel like i'm not utilizing my college time?

i'm a junior in college and i go to the University of Florida. i have roughly 1.5 semesters left before I graduate and i feel like i haven't done anything BIG throughout college.

the only things i've done is:

1.) have a year long internship (which is the most professional thing i've done)

2.) joined a sorority

3.) work at publix during the summer and during college

i am not in any clubs, i have a 3.35 GPA (kinda mediocre as a marketing major, to me), i dont have any leadership positions, and i'm not SUPER involved in my sorority. i'm surrounded by such motivated, smart, and involved women that it makes me feel like i'm not DOING enough.

but, i'm also not a "leadership"-type person. i hate being the center of attention, but i like to be a part of a team. i like to cultivate ideas and talk to people to get things moving along. i guess i could say im a facilitator.

i talked to my dad about the above information and he says what im doing is awesome and not that many people can even get into UF (which is true).

i do have some things in mind before i graduate though, such as doing community service trips (fun and a good resume filler) and possibly apply for the MAIB (master of arts in international business).

am i just a worrywart? am i not that "impressive" on paper?