How do I fix this run-on sentence?

How would I fix the bolded sentence to not be a run-on sentence? It says what I want it to, but I would like a better structure or choice of words.

While I studied at ABC Community College I worked a full-time job in order to support myself. Though the work was rewarding and necessary, it limited my ability to focus on my school work. Even though I was able to work with my professors to extend deadlines and make up missed work, my work responsibilities limited my ability to complete assignments and prepare for exams. When I transferred to XYZ College I learned to better manage my time and adapted my life to balance work and school. I was able to finish my undergrad with a much higher GPA, even though I continued to work full-time.

As StoneyB stated, the sentence in question is not a run-on sentence. It's perfectly valid as it is, and requires no fixing. As Ralph Jin suggested, you may be able to make it flow better if you add a comma after "XYZ College"; however, this is not required. It simply depends whether you want to imply a short pause at that point or continuing on without one. In this case, it would probably be easier to say out loud with a pause, so you might prefer that. The same could be applied earlier in the paragraph after "ABC Community College," where you have a similar situation.