20r overheating, help!!!!!

So i drive my corona daily 45miles one way to work it always runns at normal temp aslong as its 80 degrees or lower but in summer time when it gets hotter i watch the temp needle rise a bit close to the red mark i havnt connected my aftermarket gauges yet to see the actual temp in degrees, i have a electric fan on it i just did the head gasket about 4-5 months back i changed the radiator 3yrs ago has 4-5 months old antifreeze and also the thermostat what could be making my 20r heat up also i do like to speed but if anything the faster i drive my corona the lower the temp gets but if im stoped the engine temp starts to rise again,
ANYONE PLEASE HELP

Does anyone even get on this forum anymore seems like no one likes comenting on anything here