Even if he's one of the lesser Hemsworth's, Liam's no slouch, with seven partners under his belt. However, like Miley Cyrus, there was quite a bit of back and forth after their engagement. Really Liam, maybe if you were more like your brother and focused less on collecting partners and more on your work, you'd be an Avenger by now too.
Liam isn't currently with anyone after his seperation with Miley Cyrus, but you could probably bet on them being back together soon enough. I'll say it again, just go for the lifestyle. It's 2019 and the world is on fire, just go for it. At the very least, you'll save a lot of time not having to break up every six months.