feeling out of place

I feel out of place at work. I just started this job about 2 months ago, and all my coworkers are around my age. they are all close with one another and I don’t have that connection with them. for the most part we get along and have a few laughs but I feel like they see me as someone who isn’t worth getting to know or have a friendship with. I went into the job saying to myself “i’m just trying to make money, I don’t care if anyone likes me there or not” but slowly it started to change when I saw the friendship they had. i’ve tried to include myself in but I really don’t like being that social. I get burnt out after awhile and like my alone time. maybe they feel this. but I try to put myself out there and start conversations. I feel like this is starting to affect me. any tips?