At a crossroad and need advice!

I'm trying to make a decision and I need some input. I'd love it if some of you awesome Inforoosters could read my tale and help me decide what to do.

As some of you know, I'm living in Chicago this summer. I really wanted to do something new and exciting this summer so I basically took whatever internship I could find as an excuse to get to the city for the summer.

I'm regretting it big time. I have been more or less miserable since I got here. Tonight, after the umpteenth time of crying to my mom about it, she offered to come get me tomorrow. Here's the thing: because of her business and other summer plans, tomorrow is the only day she can come get me. After tomorrow, she can't come get me for another month & a half. The only other way I could go home is shipping all my stuff (which would be really expensive & a hassle) and taking the bus.

Here's why I'm regretting it:
(I'd like to note that I know I do sound a little whiny and spoiled... its not that I don't realize my blessings. I am just really unhappy so its hard to appreciate them.)
--The internship is shit. I'm not learning a single thing, not to mention I'm not getting paid, and its just an embarrassing waste of time. I've interned before and not liked it but got something out of it... I have tried & asked to be put to use but there's nothing to gain whatsoever. The only worthwhile thing is a reference on my resume, and considering how unimpressive the internship is, that's really not even worth much.
--I thought living with my roommate would be really great and it was one of my reasons for moving to Chicago, but while he's a good friend, his "scene" is very different from what I'm used to, and I don't fit in with or even really like hanging out with him and his friends. He also works really different hours from me, so he's never home when I am.
--I'm embarrassed to say this, but I bit off more than I could chew coming here alone. I didn't think I was going to be so alone - I have friends that live in Chicagoland, but none of them can ever hang out because its a hassle & expensive to get to each other. Honestly, I thought I'd like the big city, but I'm from a small town and I much prefer that.
--My parents are helping me financially and I feel immense guilt letting them foot much of the bill for me to do a worthless internship. Sure, I could have a cool experience living in the city, but I don't think its worth it, especially considering that my mom's business is struggling right now.

If I went home tomorrow, I would save my parents and myself money and I wouldn't keep wasting time being here unhappy. Its so tempting. I can't say I'd be a lot happier at home for various reasons (the same reasons I didn't want to go back there this summer in the first place), but at this point it just makes sense to not have to pay for bills and groceries in an expensive city that I don't want to be in so I can do an unpaid internship that I really hate.

BUT of course I still have that nagging feeling... like I shouldn't be a quitter. I wonder if I will always regret not sticking it out, if thinking of Chicago will make me cringe because I didn't "make the best of it" and more or less than ran away. I've already put almost a month into this internship, too, and now I won't be able to put it on my resume if I just skip out.

AND if I go home tomorrow, I won't be able to go with my friend from Chicago back to Missouri, where I go to college, to visit my boyfriend on the 4th. So I will go the whole summer without seeing him, and prevent my friend from taking a trip she planned because she was counting on me for gas money.

I guess this is a dilemma of keeping my commitments & being unhappy vs. being a quitter but saving myself prolonged unhappiness & my parents another month of rent.

Sorry this is so long but hopefully someone can help me see the light...