My experience doing what you're doing is below. It's good that it's tough for you to read these messages, it means they're getting to you.
When one of my friends was visiting germany, there was a "couple" that lived in the same communal housing as her. They didn't speak a lick of eachother's language. They would just look at eachother and go bang.
I spent 7 months in germany and I made good friends and learned the language thru rock climbing at the gym. I made a female friend online in luxembourg and we went on a climbing trip together, which turned into a medevac situation when her son picked up a viper. My thesis partner stayed in her room, never met anyone and just pined over her boyfriend. When we got back, I had a bunch of new friends, had awesome adventures to tell and spoke german to the point people thought I was a native. My thesis partner came back to find her bf had cheated on her with her best friend.
Find a wingman who speaks english and you get along with. I randomly met a fellow countryman on the streetcar and we went out drinking. Two extremely hot women sat next to us and they initiated conversation with us because we were speaking a language they didn't understand (it wasn't english). Too bad I had to get off the streetcar and puke when we left with them... good memories lol.
My point is, if you don't hang out with anyone and focus solely on your mission, you'll miss out on life and have no cool stories to tell from your time abroad, is that really how you want to remember your life? You need to learn to smile and forget about everything sometimes. Live in the moment.