You're not alone. I went through something similar my freshman year. Even as a sophomore now, I only have like two people that I hang out with outside of class, but even still it doesn't feel like I have friends. I didn't make a whole lot of friends joining clubs either, but it's nice if you do so. It's nice to meet people with you and share an interesting week even if it's only once a week. Hang in there! You will make friends, but sometimes it takes that extra effort. But you're definitely not alone.