I meet you in the street = "Yo me encuentro contigo en la calle" o "Yo me encuentro con usted en la calle".

You can meet someone in two different ways: by chance or after having arranged an encounter, a meeting time and place. Thus... • ENCONTRAR means to find, namely, then, in this case, it`s realated to "finding" someone you weren`t looking for, to meet someone by chance. La encuentro en la calle (Present) - The first thing a native speaker will get is that you meet her by chance. La encontrè en la calle (Past) - You met her, but you weren`t expecting to do so. • If you mean to meet someone at a determined place and time, you may use "ver". Te veo en la calle: I meet you on the street (I`ll be waiting for you there). Nos vemos en la calle (Ok, then we`ll meet on the street). You can also paraphrase it with ESPERAR--- Te espero en la calle. Note: To use ENCONTRAR in this case is not incorrect, but way too unnatural. It sounds odd to a native speaker.

I meet you in the street would be .. yo te encuentro en la calle (present tense)

Yo la encuentro en la calle Tu me encuentras en el restaurant (Both are in present) If you want to say them in past: Yo la encontré en la calle Tu me encontrasté en el restaurant