Is it the result really not important at all?

A friend of mine was dating a guy and they had special feelings for each other. They hanged out together, having sweet talks, and they have slept for a few times too
The guy told my friend that he was not ready for a new relationship yet (he just broke up with his ex for some weeks). They were happy being together and the girl thought it was just a matter of time that they were to become lovers. So she was waiting for that day to come

They used to date every weekend. All of a sudden, something seemed to be happened. The guy did not contact the girl for a couple of weeks. Not even a message or email. He did not even say hi to her even when they met in the company. The girl has been so worried and did not know wat was going on. However she tried to be patient and that she was there to wait and support him
Eventually when the guy came up again. He told her that he met a girl when he was travelling. And they have become lovers now

The girl has had her heart broken. She has been thinking it over again and again. Still she did not know wat has gone wrong
The guy told her: I was very happy being with u. It is the process that is the most important. It is not the result

Sometimes I have got no word to comfort her. Can I say to her: u've been so happy with him before. That's enough for both of u
Yea I could probably say these things. Blah blah blah. Its just I'm saying things that I am unsure about

Is that the difference between boys and girls?
Is that the result really not important at all?
Was it wrong to have expectation for love? If so, why do we have to have dreams?

Another 100,000 questions came up with my mind again....