It could be good for you to have a pet. It sounds like you are missing intimacy in your life, so maybe you're trying to hard to find this with men. Loss is painful, but it sounds like you are repeating the same struggles in relationships.
I don't like to say this, but it does sound that you are making yourself seem very needy, and there will always be people who will take advantage of this, possibly even thinking that they have done you a favour, but it got a bit too much.
I know you say "9 months into a relationship", but if you were having short meetings every couple of weeks, I can't believe he was very interested in anything long term. What was the situation where you met the parents?
I know you say that you haven't had an explanation...but it sounds very much like this guy doesn't want to TALK to you.
What if he wanted to see you in a month's time?
I wouldn't want that kind of "relationship", personally.