Being alone ? pls tell me your thoughts

I'm an introvert and really shy, I have difficulties to speak and joke around with new people.. so I have only 1 truly friend who I can talk with for hours and a few 'friends' from university. I don't have problems with my family. In fact, I think I'm happy the way it is, I don't feel alone, I just live my life enjooying my hobbies. but then these past few months, others people point out the fact that "i'm alone" .. and it makes me feel miserable and pathetic. Should I change ? make some effort to fit in ? or try to prove they are wrong? but then again why I feel this way if I'm truly okay..?

I should go and see a therapist haha ! anyway just give me you thoughts or experiences if you feel like it.