If a guy doesn't want to talk, should I take it that he's not interested?

Anonymous
For some reason, he doesn't want to talk. Even if I want to hear his voice, when I call, I get the feeling he thinks he did something wrong (or maybe he just doesn't want that kind of relationship...I don't know, even though I'm pretty sure I thought he was at one point). He just avoids me for a week and then goes back to talking to me. So I try not to bring things up. But then, all my feelings get bottled up and I cry because I can't even have a 'chat.'

I can't even be open with him. I know that it's not a good relationship, so I should move on. But I don't understand it.

Did he not like me after all? Do guys tend to not want to talk? I know guys don't like talking over the phone. But even when I tried to bring things up in person, this time about the relationship, he avoided it, said he had to go to a meeting, and left. I cried after that. Yet, he still tries to keep in touch.

I've been feeling like the horrible needy girlfriend, or like some kind of stalker, but I'm not needy nor am I a stalker. I just don't know if I'm supposed to expect this kind of behavior from a majority of guys in the future.
If a guy doesn't want to talk, should I take it that he's not interested?
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