The word apartabas is the imperfect form of apartar in the second person singular. There are other translations for this conjugation.
See the full apartar conjugation

apartar

Si me acercaba a ti, siempre me apartabas.
If I came close to you, you always pushed me away.
Cada vez que te preguntaba qué pasaba y me decías que nada. Cada vez que te tocaba y te apartabas.
You told me every time I asked you what was wrong, Every time I touched you, you gently pulled away.
Tengo que estar en el Juzgado, en este momento así que, simulemos que traté de agarrarlo varias veces y, cada vez que lo hacía, tú lo apartabas, entonces—
I have to be in court right now, so, let's just pretend that I reached for it another few times, and each time, you grabbed it away, so...
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