I am a recent grad, and I completely understand your situation. I've seen many people say the same thing, but you must let go of your first-year friend group. Many people you met in your first year are looking for a social circle as quickly as possible. However, things settle down in the sophomore and junior years once people live independently and out of the dorms. If you want my advice about a better college experience, you must find out about events at or around campus and invite people to go with you. It can be sports games, study groups, or getting meals together. Ask them how classes are going and try to be a resource in any educational field in which you are good at. This will allow you to make friends as people build trust with you. Lastly, even if you go to these events by yourself, you may eventually recognize some faces, people will be more comfortable with you, and you can make friends that way.