Trying to find friends outside of things like grade school or online circles can be really difficult, lots of unspoken rules of conversation and everyone being so insecure or fearful or whatever the case when someone tries to befriend them, not to mention the fact the some people have formed into a specific type of person that doesn't really click well with other types. It can be hard and it
is hard, especially when trying to look into the pool of people in real life, and in this case college.
I've never been good with it irl, but I've had success online at least, at least then you could try to look around for groups that may fit your niche, what ever your niche would be whether interest-based or otherwise. I'm just a trans person that signed up to Twitter and started following a bunch of small accounts and it just snowballed from there. All my beginning interactions just came around based on opportunity, joining a Minecraft server, joining LoL (for a short time) out of boredom, small and public Discord server from a mutual's tweet, a person tweeting out "friend applications", one kept DMing their newest follows with a strange meme they made up seeing what would happen, etc. It's not the same thing as real life friendships, but it's certainly a good option if you're someone like me.
Is it a valid reason? I don't know your story so I can't say, I could say that you should try to continue looking and maybe something will come your way (which is possible!) but again, I don't know everything about you. It can be as valid as anything else that's said on here, but it's also a thing that has a possibility of changing.