<human>: Can you give me the gist of the text in a nutshell?

I [18F] haven't been in a committed relationship in over a year due to getting a new job, being a full-time college student, and other activities I do. Recently at work I met a guy [21M] (we'll call him R) we talked for a while and really hit it off, we swapped numbers and we've been talking ever since. We're both interested in each other and seem pretty serious, but we haven't been on any kind of date yet. The only problem is that I have a friend [18M] (we'll call him T) who I'm very physically attracted to and who has been flirting with me lately. 

I've been friends with T since high school and have been attracted to him for as long as I can remember. T and I have been hanging out a little more and he's been flirting a lot. I don't think I want to date T, I just want to sleep with him. I value him as a friend, but I don't want him to feel lead on or get hurt if R and I do end up dating. I guess I could just use some advice for the situation. 

Thanks in advance for any advice!
<bot>: I [18M] might be getting into a relationship with [21M] that could turn serious, but I'm really physically attracted to my friend [18M] who has been flirting with me. Any advice?