Your long story was all about "you" really. Then as soon as she learned some things about you that were a concern to her, you smothered and stalked her. You did not respect her need for space and time to think "at all". The hotel, the flowers the new suit was all about "you" again, you getting your way in spite of her telling you to give her some space. So, yes, you basically disrespected her need for space "big time". She even gave you a book in an effort to "again" express the need for "space", but you did not "listen" to that, but instead you were again just thinking about "you". That is a big red flag to a woman. It is not "romantic" but is instead "addictive behavior" and this time addicted to "being in love with love" and you were showing her how obcessive you can be too, which is yet another "red flag".

When you don't hear/listen/give another person space and respect their space, you will be faced with the other person "avoiding and backing away".

Now, with this lesson don't be hard on yourself, learn from it instead. We all are capable of making some "big" mistakes in our lives. We can actually learn to "survive" in spite of these mistakes and make sure we dont repeat them.

That car you saw in her driveway could have been simply an over night guest or a friend, but you assumed it had to be another man right? That is just not good, not for her or yourself, again, it's obcessive. You never owned her, she was never really "yours" and even when a person gets married, that still doesn't mean they "own" the other person. Everything you wrote is "possessive" too, where you dreamed of her driveway being your driveway, her house being your house, her and her daughter being yours.