mightbeinlove - I hope that you're doing OK, and I hope that this doesn't sound too harsh, but here is my feedback...
I don't know why I feel so pessimistic but I just feel hopeless right now.
It's not healthy to feel hopeless already! Please take a step back...
If my understanding is correct (from reading your first post) - you've only known him for two weeks? It might be premature to classify your relationship as being wrought with love. I understand mental and physical attraction, and "love at first sight" - which is that attraction that you have with one another, however, it's still so premature that you can't place all of your eggs in one basket and assume that it's the love of your live in a two-week-time-frame, when in fact, you have to allow it to evolve.
Your internal happiness has to come from within - and not from other individuals. Love can't make you happy unless you're already happy; love can't be there to fill that void - and the same goes for your friend who is grieving.
At the same time, I also feel like I am prepared to be alone and not even bother with love.
Being single and not having a partner to love shouldn't have to mean being "lonely" - those two characteristics should be mutually exclusive.
Sometimes it's also good to let relationships occur naturally rather than trying to "find it too much. "They" say that before you can share your life with anyone, you gotta be comfortable with being single also. The underlying theme to this is that you have to know what you want, be comfortable in your own skin, know and have your own likes/dislikes, and as a result, you end up being happy "from within" - first and foremost.
I might be fantasizing but I hope I am not. I hope that he is real and I hope that at the very least, we can have "a chance".
Should I be waiting? Or should I let it be and move on?
To answer your last question, it really sounds like you *do* have that "chance" - you really have to do both - "wait and also let it be" at the same time. You won't really know how your relationship will work until you allow it to grow, breathe on it's own, and it takes its course naturally.
Try not to over-analyze his every single action/reaction/communication. There is know way to know this soon - if he likes you - he likes you; if he doesn't - he doesn't. You have to give it some time and space, don't "force" the relationship, and try not to put all your eggs into this same basket. Otherwise, it'll come crashing down.