Summer Classes to pull GPA to a 3.5?

Hi there, I'm a rising junior at a target. My GPA right now is like a 3.39. Would it be wise to take easy summer classes in an attempt to push my GPA to >=3.45 so that I can round it off to a 3.5 in my resume? I don't exactly have the motivation to do summer classes as I did summer classes last year, which put me ahead in terms of credits (I'd have to take just the minimum # of classes in the future semesters to graduate on time). Despite not having the motivation, I am still fairly confident of being able to push my GPA to a >=3.45 by taking the upcoming summer classes. However, I really want to just enjoy a full summer for once but am worried that I could be screwing myself when it comes to finding an internship.