yeah you're right.
But in my opinion and experience (and I know this is a generalization) MOST women need more of the affection, intent listening, and enthusiasm to make a relationship work on a level that most men do not.
"he's not putting enough into this relationship" (??) and, "I don't see us having a future together"
Thats what I think that means. Long distance relationship + she say dude not putting in enough = She didn't understand how to communicate and you didn't understand what was missing till too late (if I'm right).
I am not saying that all dudes are gritty, insensitive, hardasses and all women are delicate flowers. I'm saying as a man you have to realize that your gf (being a woman and going off of what you wrote) needs more of that stuff and needs to feel like you aren't getting too complacent and not giving a shit anymore.
Fuck, my ex gf dumped me when I was at work a day before I came home because she thought the same shit. I don't like talking on the phone and I told her that. I still called her every day after work but after awhile there isn't really shit to talk about. So conversations got shorter and shorter. I tried to talk more about what SHE was doing but she was in a bad place and would either just complain and complain or turn the conversation back around on me. I didn't have shit to talk about....
eventually I just kind of stopped calling everyday to every other day and whelp... another dude took my place while I was workin.
Point I was tryin to make is, girl felt like she needed nurturing (I'm assuming) and didn't get what she wanted. You were content (I see no complaints so I'm assuming) you being content means she met that end of the relationship for you. Your needs were being met and you were all good, so you assumed she was too. She fucked up not telling you what she wanted, but alot of women just WILL NOT do that.
You have to read between the lines and figure that shit out on your own. Either that or go find a girl thats very vocal with that stuff. Thats what I liked about the last girl I was with she'd pretty much tell me shit like that plainly and I liked that about her but she wasn't in love with me either so I dunno how she would've acted if she was.