Translation of tristemente

His name was Leo and he would become a good friend of mine during the next two weeks. He had a lovely girlfriend where he stayed during my visit. Basically, I slept in his place when he was away.
The ride took us through mountainous areas, covered with dark green forest, with so many curves that I got sick. I wanted to vomit but I held myself back, as there were so many other next to me.
The ferry took me to the island. Sitting next to me there was a local guy with two packs of beer, and he seemed pretty drunk for this hour of the day. He offered me some beer and I was polite.