I'm having some of trouble becoming the Thane of the Rift. I've spoken with the Jarl of Riften a few times and I've already completed that short miscellaneous quest where I had to deal with the Skooma trade plaquing the streets of Riften. After doing this I was hoping the Jarl would give another quest which would grant me the Thane of the Rift upon completion, but yet there are no new topics or questions I can speak to her about. I was expecting maybe one where I would have to do things around town and become known and liked by the people since there are so many miscellaneous quests to be done here in Riften. Unfortunatly the Jarl still won't speak to me about anything of the sort. If anyone has any ideas or can help me on this it would be greatly appreciated!

Have you talked to the assistant or whatever

Have you bought the house and helped 4 or 5 locals (people in the city)? And make sure you did all three parts of the Skooma quest.