Getting involved with a girl on facebook

Q: I met a girl on facebook 2 weeks ago. We became good friends in only one day and the second day I told her that I love you. She also responded
positively but after two days I prayed namaz and I felt very guilty of myself for getting involved in such a henious practice as I had never done this before. So I told her to forget me and I cut off all the contact with her but now she is saying that you betrayed me. She regularly calls me but I don't pick up her calls. I only left that girl for the sake of Allah. Please help me out, have I done right or have I betrayed her really? Will I be punished for
hurting her? What should I do now? Please help me mufti sahb.

Washing the mouth in ghusal

Q: 

  1. Is the plaque (white dirt) that accumalates on the teeth neccesary to remove and the wax on the ears for Ghusl to be done?
  2. Till which portion of the mouth is it Fardh to wash for Ghusl to be done? 
  3. Dirt stuck in between the teeth without removing them, will the Ghusl be valid?

Maaf for the Takleef, I always had doubts regaarding this, resulting in me spending lot of time doing one Ghusl.

Discharging one's zakaat late

Q: Regarding Zakat Al-maal, what is the ruling on one who pays this late, like a day after his anniversary? Is there any sin on him? Because he was trying to find a suitable charity that he trusts, for the imam he was used to giving his zakat Al-Maal to was somewhat dubious in the end. This caused him to be late in paying his Zakat, while he was trying to find a suitable cause. So what is the ruling on this, and on the one who pays this late out of
laziness? What happens to his reward in both cases?