I send text messages to girls.

Relax, maybe she asked for it temporarily. Is it? Don't worry about those uncertain things, okay? I don't think it's embarrassing to refuse. As netizen chirish 124 said above: If you don't want to answer the phone, this text message won't reply to you. Don't you think? Anyway, don't worry, okay? The more you do this, the more embarrassed the girl may become. Don't be so nervous.