What college advisors and success coaches will always tell you is that connections are everything, which is true in really any field you may be studying. They'll say also that internships are crucial in gaining new connections in order for you to jump-start your career and by the end of your four or more years in college, you'd have a job or something lined up by the time you get out.
That's what we all want in the end so we try to get a head start on trying to find internships everywhere, sometimes not even fully reading into what the internship entails and ending up with ones we don't necessarily enjoy. As a fellow student who just finished his first year of college, trying to get an internship before school let out was the only thing on my mind. Giving my resume out left and right, I believe I accumulated over 15 internships that I applied to, but as you can guess by the title of this article, I didn't obtain any. Either I was denied, the position was terminated, or I straight up didn't hear back, and it sucks, but it's ok.
For everyone else in the same boat, don't beat yourself up about it. We only have one year down and most businesses don't take freshmen anyway. We're 19, maybe 20, years old. We're still young, thus we don't need to have to try and jumpstart our careers so soon, we still have a lot to learn. 3 more years of undergrad is a short time, but there's a lot to be learned between now and then.
What I say is go back to that part-time or seasonal job you had and make some good money. Unless you found an internship that pays compensation, not a lot of them pay well so go ahead and walk around your local mall with your resume under your arm and hand them out to any store you want too. This summer is your's for the taking so just because you couldn't get an internship, doesn't mean you can't still make the most of it.