Is there a way to tighten my skin in a safe way?

Not by much. The shrinkage or tightening effect we can get with today's equipment, regardless of the brand name, is very mild - especially compared to what actual traditional surgery can do.
Thermage or Titan. Thermage and titan are laser devices that provide a nonsurgical alternative for skin tightening. Thermage uses radiofrequency energy. Titan is an infrared light source. It doesn't compare to a facelift but for those with mild to moderate sagging it can provide about 20-30% tightening. There's no downtime with these procedures.