How to fit in at a new workplace?

So I started a new job in August. I like it very much and I enjoy teaching my new students. The problem is that I have a feeling that my colleagues don’t appreciate me. Meh, I am being harsh now, I think they do, but they just don’t make any effort to get to know me or even show they want to know me. Sometimes I do feel they really dislike me… And I HATE that feeling! I want everyone to like me…

I guess there could be a chance that I haven’t been the best socializer. My previous job was great and I loved my colleagues. I guess I miss them a lot and I am being a bit reserved when it comes to making new aquaintances. But I am trying hard to fit in, but I get no response what so ever. And I guess it is hard to come to a new workplace and it is hard to get in to a group. But after half a year I feel things should have been, well, easier by now.

I am not an unpleasant person in any way. I am happy, always smiling, like to meet new people and enjoy a good laugh. Now, the most important thing is that I get a long with my students, which I do and I am very happy about that. But I do feel lonely at times, which I shouldn’t in a workplace with 80 grown-ups working close together.

What can I do? Should I bother as much as I do? Am I only imagine this?