I met a guy 4 years ago on a training course ....?

but back then i was with my ex, so i didnt follow up on any feeling i had for him. and 4 years on we still speak every week on the phone. im now single, and hes coming across in 2 weeks to see me. - now he was supposed to be coming over a year ago to see me after me and my ex broke up, but i cancelled on him because i was scared of what might happen. now im in the same situation. we both really like each other. and after 4 years and still having the same feelings is pretty darn good in my book. but i am petrified incase he wants more while he is here. has any one else been in this situation? or have any advice?