It can grow out of friendship. Happened with me and my DH. We started out just being friends and on the Cross Country team at our high school together. It grew from there.
BUT you say you have been talking to this person for months. If that has been happening in person, and you have not developed any kind of physical attraction (I assume that is what you mean) to him, then it’s probably not going to happen. We knew only a few weeks into our friendship that it was going elsewhere. Funny thing… I didn’t think he was that great looking at first. (I was even actually chasing another guy at that point!

I once confessed this to DH, and he just looked at me like I was being obtuse and said, “I knew that!” LOL) But over time, he turned into the sexiest guy on the planet. We’ve been married nearly 11 years, after being engaged for about 4, and we still can’t get enough of each other.
If you have been “talking to” this person online, then there has been no real chance for chemistry to develop. People think these are real relationships…

It may be a good way to connect with people in order to meet them, but you have to actually MEET them and then interact with them in person to get to know them. I don’t know why they call it chemistry, either. That sounds so scientific, and honestly, it seems to have to rhyme or reason to it at all. I could be faced with the most physically beautiful man on earth, but if he is rude, or mean, or crude, I won’t find him attractive. (This has actually happened. Saw the cutest young Italian cop in Chicago… he really snapped my head around. Then he belched out loud and spit on the sidewalk. He immediately lost all attractiveness.) Now, I must add a caveat that I am a woman, and men will probably see this differently. The closest thing I have gotten to a comment from a guy about how personality or behavior affects attractiveness is, “Stupid women are boring,” from my DH, usually when I am apologizing for being difficult.

(He seems to think my “difficultness” results from an oversupply of brains and backbone, and too much willingness to connect them to my mouth.)
Anyway, unless there is a reason not to, give this a little more time, maybe, but not a ton. If it hasn’t happened yet and doesn’t happen soon, it probably will never happen. That is, if you have been seeing him in person. If it’s online, then wait until you two are spending time together in person and see if it develops then.