WHAT CAN I SAY TO START A CONVERSATION WITH MY GIRFREIND!?

I ALWAYS TALK TO HER ON THE PHONE N THERE TIME THAT I BORE HER N I KNOW ITS TRU I TELL HER "DAM IT IM BORING YOU HUH?/" N SHE SAY"NO UR NOT"BUT I KNO I AM and dam its not on purpose im just pretty slow n dum n dam seriosly im a very slow thinker i try tho i realy do dam i realy love my girlfreind on the serio i love her so much n i dnt want her to ever leave me cuz im slow n boring her she asked me to marrie her wen were ollder n dam i got happy n jes were planing to get mariied wen she like 23 shes 17 dam i love her so can u guys/girls plz help me how to start a conversation !!!!!>>?????PLEASE!!!