<human>: Can you summarize the given text in a few sentences?

Should I text him?

An old friend of mine, who I have had a crush on since high school, and who I had sex with a year ago recently moved back into the area. He has been "seeing" another girl for some time, but he is still single on facebook and I know from the past talks I have had with him that he cares about her, but not like that (not seriously). I stalked on facebook and she has been posting on his page regularly lately. 

Him and I recently saw each other for business purposes (me buying some chocolate mushrooms from him). He asked me if I was seeing anyone as we caught up (it has been a while since we have talked/seen each other). We always start right back from where we came from, as far as chemistry and friendship it seems. He also offered to take some with me but I declined. 

In the past he has expressed that he "liked me" (at the time) and I have heard from a few other friends in the past that he had a crush on me in high school too. He joined the military and kinda changed since high school but me and him have always been close and I even sent him b day presents when he was doing his tours. In the past I have always had a boyfriend or been emotionally unavailable. 

We made some casual (not serious or confirmed) plans to meet up in the future for drinks with other friends (not a date). I just left his house and when I got home I had a text from him saying "let me know how you like those [mushroom chocolates]". 

Now I know that this seems fucked up since I know he has a girl that he seems to care about, and she seems to care about him. But I can't help but feel like him and I would be good together, and I keep getting the feeling that he would be into trying it out. Should I put myself out there and risk making our friendship awkward? Should I even pursue this? What should I say and can I convey it via text? I really appreciate any insight you guys have.
<bot>: He is seeing someone casually, just moved to my area, and we have had a thang in the past. Should I ask him how he feels?! How should I approach this? Is it ethical?