What if you're friends with girl a little longer(couple of moths). Is it wise to be straight forward and tell how you feel about her? Has anyone of you ever tried this and did it work out?

Tried it back in the day - never worked. This is a perfect example of how what every girl says she wants - "A guy who is straight-forward and honest and doesn't play games" - is the complete opposite of what she wants.

Women are naturally attractive, men have to build attraction. Basically, we all start out like 400 pound girls with busted-ass faces. Imagine a girl like that coming up to you and telling you how much she likes you. It would make her seem even LESS attractive (if that's possible).

You need to get a book on how to build attraction (I like the Mystery Method). It lays it all out in a straightforward way.

No never try this. I did it once with a girl i had been with in the past. It did'nt go well to say the least. Proper fucked me up. But learnt alot from this and made me see where i had gone wrong.
And it is the reason why i ended up finding the community, so it was a good thing really. But it still hurts. I wont be repeating that mistake again.

The only way to tell her is with actions. Build things up and then go for the kiss when the time is right.