Should i just ignore this girl ?

Okay so i met this girl online (first time ive ever done that). We went for a coffee on the first date. We talked for about a couple hours and things seemed pretty good. She was pretty nice and i was attracted to her (even tho she used an old pic online-she was quite a bit heavier then the pic, still cute tho)but seeing how it was a first date i knew i had to get to know her better before jumping into anything serious. Anyway at the end of that first date she wanted to kiss me, ok i thought cool. So we were kissing, then after about ten minutes she said she wanted to sleep with me (i thought this was very strange) anyway i told her its best to save that for another. so i go home kinda wondering whats up with girl. usually good girls are not like this. So the next day i messaged her, she immediatly starts saying things like "i need you" etc she even said "i think i love you". So by this point im worried ive made a mistake. anyway she kept begging to see me that night, i told her i was busy for the next few days. she immediatly freaked out calling me everyname in the book. i said calm down we just met. then she said something nutty, "if i didnt have a kid id kill myself" i felt bad and said look i told tou in couple days id come see you. She got happy again when i said that. ok so the next day she starts sending me crazy messages calling me names saying i dont want to make time for her. I seriously think this girl is a nut job now and dont want to see her again. Should i just ignore these messages and never talk to her again ? Just wondering what some of you would do, im not used to behavior like this. Thank you for your advice