Stalker

So I work at a school and one parent in particular has been giving me trouble. Ever since the first day he said hi to me hes been making sure to park next to me to talk even if I move my spot to hopefully avoid him. It started off with just innocent comments about my pretty eyes and whatnot. Then it moved onto him knowing personal information that I'm not sure how he got (my maiden name etc). Last week he made the comment "I dont know if your husband tells you or not but you've lost a lot of weight recently. Dont go ruining that gorgeous body having another baby". I know I should have told my fiancee then but I didnt want to worry him. Then I noticed him driving slow by our house. It freaked me out but I had a meeting with my bosses the next day anyway. That morning (yesterday) I went to go get coffee and he was at the gas station that I go to every single morning at the same time. I've never seen him there before. I waited a few minutes in my car for him to go but he stayed inside staring at me. I was going to be late so I went to go in the other door and the man walked over to the door I wanted to go into and opened it. As he looked me up and down he said let me get the door for you you beautiful women. So at that point I'm super uncomfortable and he wont leave me alone. I got my coffee and flew out of there. I told my bosses what's up and they are going to handle it with him. Then this morning i got to the gas station a few mins early and as i walked out he walked in. I've been going to this gas station for coffee everyday at the same time for over 3.5 years and never saw him there before. He is a known crazy person who has violent tendencies and he uses a lot of coke. I now realize that I need to tell my fiancee. Part of why I didnt want to tell him is because I have a stupid ass guy I never dated from 8 years ago who stalked me until less than a year ago so he gets super weird and crazy protective over this stuff. I'm so not a pushover and have no problem defending myself against a man so even though it's weird and bothers me I'm not scared. Obviously now my fiancee is going to wonder why the hell I didnt tell him before. I just didnt want to make a big deal out of nothing but now it is. I did nothing wrong and I know that but I have no idea on how to even bring the topic up so he wont freak out