Online crush

I actually have an online crush with someone I have never met before.  We "text" and "chat" daily so we have been getting to somewhat know each other and I actually look foward to hearing from him..NOW he is coming from another state to stay with me and my children..I havent even met him yet, but I am picking him up tomorrow when he gets in state and I am going to let him stay here for a couple days..before I even meet him??  Have I lost it?  We have been talking for months and I know lots about him..so I sure hope "on-line" dating is the same thing as normal dating..what if I dont like him and dont want him to stay??  What if I do like him and he dont like me??  Is there such thing as a long distance relationship if we do connect??  If I didnt feel so positive about this then I would have never given this an idea..but we have been talking for months and I even know where his grandparent lived, his grandfathers name...we also know the same one person..neither one of like the other person..but we both personally know him...I know where he lives, the city his son lives in, the city his mother lives in...I so hope I am doing an OK thing..I do confess I am scared, but I am actually letting a stranger stay with me and my kids for a couple days..wouldnt it be almost like letting a roomate move in??  I did want a roomate to share the house with..so maybe this could be considered the samething..