i don't really want to get implants but i just need to fix my forehead temples
Filler is an option but only a temporary one. You will need to keep touching up the areas. Implants themselves are a better long term solution. Your strong cheekbones also accentuate the temple area, so you may consider softening those up to help minimize the discrepancy.
Hi there! Filler can work very well in the temples. My preferred fillers are Juvederm Voluma or Sculptra. The first is a hyaluronic acid filler which holds good volume and can last 8-12 months on average. Sculptra is PLLA and generates quite a robust response. It's important to massage the areas post injection with Sculptra to reduce the risk of nodule formation. Hope this helps!