From a guy’s perspective, holding hands can mean several things. The implication is all dependent on his current mentality when it comes to dating. Based on the collegiate environment, he is probably still in the phase of his life where he seeks to explore all of his physical options; Therefore, he is not ready to settle into a committed relationship.
Because of this, the holding hands is more of a physical act, opposed to an emotional connection. If he is a selfish lover, the increased act of intimacy serves as a turn on for himself. If he is the giving type, he held your hands in hopes of you further enjoying the physical experience you shared with him.
I hope this helps.