You don't need to be completely heartlesss when you write something. Some of the best writing that I've ever seen was because the writer allowed her emotions to fuel her character. Hell, a promo that I wrote somewhere else got me the win and it was a pretty depressing rp...It was the only rp that I wrote because it ended with Micah leaving everything to believe she blew her head off...(Sorry Radio lol).

Try writing your roleplays on something like Word, notepad or if you get an idea at school, jot it down on a piece of paper and build off the ideas to create something that doesn't seem like it took you 15 minutes to write it.