Hang in there = طاقت بیار
Get over it = باهاش کنار بیا
1- in the second half, we just had to hang in there.
2- It took him years to get over the shock of his wife dying
1- در نیمه دوم، ما مجبور بودیم که مقاومت کنیم
2- سالها زمان برد که با فقدان همسرش کنار بیاد
Source: http://dictionary.cambridge.org