Search Results: get over my first love

So I met my best friend a little over a year and a half ago. We both work at the same place and hang out outside of work and go to the same college (we were basically roommates). I was originally “in love” with another guy whenever we started hanging out, and he helped show me that he was toxic for me. After that, I was able to get over that guy and focus on myself. Doing that, I realized that I actually had feelings for my best friend. I thought it was nothing at first, but throughout our friendship, those feelings have grown a lot stronger.
We both love Star Wars and Marvel. He makes sure I know that I am invited to different events that he is going to and tries to include me in everything. We go on late night drives (just the two of us) and listen to music or talk if either of us are upset or overwhelmed. People always know that he rides shotgun in my car because he designated himself as my co-pilot. I have had a few people ask me if we were dating because of how we act with each other.
The reason I haven’t told him yet is because he has a girlfriend. This hasn’t been a long-term girlfriend, but it’s been going well for them so far. He’s fallen for both of my best friends in the past and I’ve always been there to give him advice about any of the girls he was thinking about dating. Currently, his girlfriend and him are doing well (other than one night that they got in a fight and he ended up crying and talking to me about it).
I’ve had the overwhelming urge to tell him lately because my feelings are growing so strong and it hurts me a lot of the time. He’s also been teasing me a lot lately (jokingly) and is always cracking inside jokes with me which hasn’t helped. His girlfriend is so great and I love her. I’m just scared that I’m gonna go insane if I don’t tell him. I also don’t want to lose him as a friend because I don’t think I’ll be able to handle it. People keep telling me to let it run it’s course and I’ll get over it, but I haven’t.

What should I do?

Here is my first post

I got a lot of different replies so i did a poll.

Basically he is everything I've ever wanted but he's very close to his best friend. She has an amazing body angelic face and great personality. She makes me insecure.

1. Before we started going out she basically lived with him. They both have there own penthouses but she would cuddle with him in bed while wearing his shirt every night (They stopped this after we stated going out)

2. He greets her by calling her Babygirl, Kitten, Princess while back hugging her. He gives her piggyback rides and randomly picks her up sometimes.

3. When he is drunk she is usually all he talks about or he call/text her

4. When he goes back home to visit his parents she comes along. She is basically a part of his family

5. He has her period schedule on his calendar. He says he keeps track for her because she always forgets to write it on her calendar. He also does it so he can prepare snacks and ice cream, movies to watch, and music to listen to. He makes sure she has pads and tampons and if she has run out he will buy some for her. He is really organized and she is kind of go with the flow and doesn’t prepare for things, so he does it for her. He sometimes even builds a blanket fort for them to watch movies. He does all of this to distract her from the pain. When it’s really bad he plays with her hair and sings her to sleep. He also buys her “period prizes”. Apparently her mother used to buy her gifts when she wasn’t feeling good, so he took over and started buying her a present whenever she doesn’t feel good.)

6. I walked in on him moaning and her straddling his bare back as she massaged him in his bed. (She saw me and offered to do me next)

7. He has also canceled some of our dates when she wasn’t feeling well or was upset. She never asks him to do anything for her but he always runs. And he will do literally anything to put a smile on her face when she is upset, no matter how stupid it makes him look.