Yes, it is a choice, after the initial hit of the ‘meet, mate, procreate’ brain chemistry cocktail fades.
A certain level of ‘attachment’ is necessary to bond in a loving way, but, most of what people call ‘love’ is an addiction to feeling they NEED that person to complete them and lend security in a way that cannot be done by a human being.
One must think with their head equally, as with their heart.
This is where the big dysfunctions come into to the ‘love’ situation. Far too many people stay in unhealthy relationships due to their emotional addiction, fears and insecurities than anything, even remotely, about true ‘love.’
True love is knowing when to let go as much as when to hang on.
You can’t claim to love someone if you are beating the psychic crap out of them if they choose to move on or you are attempting to ‘secure’ love by any means of control, jealousy or emotional manipulations.
‘Feelings’ are the least of it, contrary to what most people think.