TRANSMISSION LOST by Stefan Mazzara

Jack Squier is a civilian cargo pilot in a future where humanity has begun colonizing other worlds throughout space. This period of expansion has led to prosperity, but has also led to the unfortunate realization that humanity is not alone in the universe. Humanity is now at war with the Ailian Ascendancy, a fiercely territorial empire that does not take kindly to humanity encroaching on their domain. Over this decade-long conflict, humanity’s ships have been spread thin across space as they fight to hold back the Ailian fleets.

With military ships becoming such a precious commodity, civilian pilots like Jack find themselves pressed into service running supplies for the UN Navy. On one such cargo run, Jack encounters the enemy in the worst way possible, and sets in motion a series of events that will change the future of humanity. 

https://www.goodreads.com/book/show/27236475-transmission-lost

Teratophilia recommendation by @winged-wolf-tsuki who shared some relevant information for monster lovers: ”It features a female character that is not only stronger than her human partner but much taller. The start of it has some similarities between Enemy Mine and Starkissed but then it starts to branch out a bit more. I found it a unique read.”

More books with monsters as the love interest: HERE