How do i know if he likes me or not???? guys and girls please!! i really like him.......?

well first of he had a girlfriend....... ya i know but ya :( and second off im almost positive he doesn;t because only one guy has ever liked me and he was.... gay not actually but acts it. cause im not that pretty... not ugly but not pretty. haha :( anyway ive been txting him 2 times since me and some of my girl friends hung at his house the other night. the first i started and said thanks for having us over sry we were kinda loud. then he was like kinda haha jk and then i asked later do u think im a spazz he said in a funny way. and then i said haha ok and then he stopped txting me.... 2nd time i started it hey and blah blah and then when i said yup he stopped txting me. so i guess he probably doesnt like me.... but please answer :)