How do you become more than friends with a guy. 10 points best answer?

we've been friends for about 3 years now, since high school. the thing is he's my first love's best friend. but my first love and i never were in a relationship so technically the whole ex's friends off limits thing doesn't apply. we hang out often but i've never gotten super close to him because of the whole he's friends with whats his face who broke my heart. but my friend is actually a really sweet guy and he's done a lot for me like baked me a cake for my bday and buys me candy when we see a movie and opens the car door for me. i know he's attracted to me, but like i said i've never really opened up to him or laughed really hard with him nor have messed around as in acted goofy together. i kinda wanna let my walls down and see what could happen. he's single, i'm single. why not right? but how do i go about doing this? i don't wanna seem fake because he hates girls like that and i don't want there to be weirdness with his friend who broke my heart. i really just wanna see if maybe he'd be the right kinda guy for me. how do i make him see me as more than a friend?