45-60k sounds a bit agressive - The market is flooded with people who can do the same type of work (and are) for far less.
Key questions to ask yourself when you're feeling under valued at the work place are:
1. Why did I take this job?
2. Am I doing more than expected? (You would have a hard time convincing me to give you a raise if you were only doing what you were hired to do in the first place).
3. Am I happy?
4. Would I rather lay in bed or get up and go to work?
I think you've already answered the third though. People who are happy at their workplace dont typically question their compensation - at least not at this level of employment. Also, being an intern, you pretty much know what you're getting out of this job: experience.
The best thing you can do to increase your worth in the company is to do more than is expected, always ask for more work, come up with creative concepts and the means to impliment them and be an overall nice person to work with. All the previously mentioned things do get noticed by employers and are bound to get you to where you wish you were quicker than whining about needing a raise to co-workers.
On the flip side, you could always freelance - that is, if you're as capable as you say you should have no problem finding work