Boyfriend obligations? What are they?

Beside being faithful, what are these 'rules' that guys have to follow when being a boyfriend? I don't see why guys are so afraid of being in relationships so I want to know what of it beside being faithful is so damn scary? I have never had a boyfriend but I would pretty much only expect him to be faithful so I was wondering what other girls expect their boyfriends to do for them?
Boyfriend obligations? What are they?
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