How do I fight post-vacation blues?

I wanted to ask the internet of how to fight these post-vacation blues when I came back home from traveling. I went to the UK recently having a lot of fun, but then I realized I had to come back. For me, nothing brings me true happiness except traveling. I went to the UK for a week and it the most greatest trip I've ever experienced. I have a relative there that I love a lot. When I came back, I cried so much that I couldn't sleep for the night and I cried in the plane too.😭 I will thank you if you manage to help me.