I am similar. If I reach out to people - and am afraid of looking like I am pushy or agressive, or there's something I want beyond what they do so they'll reject me.
I like receiving texts. And if I know that the other person likes to receive them too - I'll send them. That applies to email, phone calls, IM's... all of that.
Then I look at my OKCupid account and all the people I've reached out to - and find that ... nothing. No response. Meh.
But for me - its trying to find the balance between "I don't want to bother them" and "I hope they don't think that I'm a pest" which usually falls right around them either saying or showing that they'd like to continue contact.
*notes to self to go check if that's a cell or landline that I have*