just came back home after visiting my cousins and I'm sad

I'm 25 years old and I have 3 cousins who I'm very close to. They all live together in the same house. I have been lonely for a long time and only recently I've started talking to people again. We live about an hour and a half away from each other. I haven't visited them in a long time and I missed them so much and they also missed me. I was so excited and I'm a bit of a homebody so I haven't been to any house other than my own in a very long time. So I visited them today and I had so much fun, we had lunch and dinner together, talked, laughed and played games. From the moment I got home I've just been thinking about the moment I saw them, hugged them and how much fun we've had. We haven't seen each other in almost a year and now that I'm back home I just feel empty and sad. I miss them already. I wish we could hang out more often. I miss the feeling of being around people I love and care about. I'm not good with words but I hope you understand what I mean. I know it's not forever but it feels like it right now. I just want to go back to the happy times we had today.