It does get a little lonely at times yeah, but I'm kind of used to it
Some ships do have internet connections, but neither of the two I've been on did. I had to rely on my mobile internet, which was patchy as hell and expensive, or a Mission to Seafarers, which arent in many of the ports.
I think I was pretty lucky in that we only got really rough weather for maybe 1 week or so out of the 6 months. I was only scared once, and that was when I went outside to smoke cause I don't like smoking inside and almost went overboard. Other than that, it was just annoying not being able to sleep cause I was literally getting thrown out of bed every 30 minutes.