over the past few days i have noticing that my car is getting heat up and the temp needle is at half
Even if you have direct fan, this is normal engine operating temperature.i am sure thermostat valve is installed.
and i dont use high rpm's only till 5 or sometimes 6 not more than that
for continuous use 3-4 is already high rpm.
is this your first car? i think its clutch is slipping and remember, car can heat up due to high rpm.