Most Helpful Guy
You could take the time to make the first step (ask for a date etc) if you're interested in them too you know? If you're not willing to do it, they might not be willing to do it too.. Not everyone has the confidence to ask a girl out because of the fear of rejection, and sometimes when guy's stop contacting you, it's just like girls when they want them to initiate conversation first to show that they are interested.
Other reason's may be because conversation is boring, or maybe you left a text that they can't reply to? Like "Okay". Or maybe they just aren't interested in you. There are so many possible reasons but you have to find out for yourself. Try asking one of them. Be like "Hey, why did you stop talking to me? :(".
I hope your dating life goes well :) and I wish you luck!
Most Helpful Girl
The guys you've experienced all seem to exhibit this trend but not all guys will. When they "seem to be interested," it's possible that you are misreading their intentions. If it is just a friendship they were after and this friendship became based entirely on texting, they could have easily just moved on. It's no one's fault; it's just what happens.