What should I do??

I been living with my boyfriend for about 11 years we been together since we were 18. Since May of this year I find a person through an appl and we where texting all the time he lives in other state so I okay talking with him and have someone to talk about my problems. But in August I find out that I feel something for this new person and and break up with my boyfriend. And las month I went to meet this person and it was awesome we are just like if we knew each other from years. My boyfriend still living in my house but in a different room, he's always saying that we can be together again but I don't know to do???