Hmmmm well never try to make a Leo jealous by talking about other men...hahaha....but seriously, he may just be busy...men cant multi-task so if he's busy, he's that, BUSY.
Just chill out and you've let him know he's welcome to come over - let him come to you 🙂 Trust me, Leos have no problems in finding their way back
BK Chatz is right, you talked about another man, a rival at that to your guy, that is a NO NO especially with a leo who has a rival and a huge ego, he may be feeling betrayed and just doesn't want to make much effort to be around you right now. Nothing you can do or say but wait it out and please stop doing silly little girl things that turn men off, maybe take this time to learn about do's and don'ts around men. I notice a pattern of you DOING and SAYING things that usually turn men off and then you scurry back here asking for help, stop sabotaging your relationships if you truly want to keep him/a man in your life. Maybe pause, ask yourself would this cause conflict like jealousy, distance, THINK a little before letting certain things stumble out of your mouth.
You can go to him and apologize like no tomorrow and he will most likely open up but not respect you for groveling or you can give him some time to come to you which he will if you give it time to blow off some steam. Give him some space to breathe and he will reward you for your patience with lots of leo affection.
Who you date outside of him and see outside of him is your business BK, it's none of his business and I'm sure he doesn't drop a huge list of females he's dating and talking to daily either. When he comes around just be yourself less the anxiety and angst over his disappearing act, he told you he's busy with a project, respect his decision not to continue contact until he's finished his project, no you may not appreciate what he's doing but that's the way it is right now. You yourself said your not a couple, your not official so really he's not doing anything wrong towards you or the friendship. Stop beating yourself up and go out with your friends, or go out on a nice date, do something that FEELS GOOD to you instead of sitting around thinking about him all the time, that is not attractive nor emotionally healthy and that is not what a healthy women would do when men flake out and/or become distant and absent. Just go take care of yourself like he's doing, you will feel so much better and in control if your doing something other than worrying about him. he knows your green when it comes to dating and he's just taking a break.
Date yourself first then anybody else. Learn to be in love with yourself then the other. Give importance to the other only if u get that back in return.
Just some random thing that came to my mind.......ignore if u think its irrelevant.
Stop trying to orchestrate everything and go with it...he's called it hasnt been 2 months but just over a week and he told you that he would be busy!! You are sounding way too desperate and clingy and if it continues he will see that and flee. Now relax and breathe and get back to dating the guy not trying to tie him down already!!!
Just chill out and you've let him know he's welcome to come over - let him come to you 🙂 Trust me, Leos have no problems in finding their way back