How to reduce facial width?

At least from the one photo of the upper two-thirds of the face, it would appear that the use of a volumizing HA filler, particularly in the region of the upper, outer cheeks would significantly contribute to contouring a more ideal, oval, heart-shaped feminine face. Unfortunately, the lower third of the face is not visible,. However, in general, if enlarged masseters are contributing to the more masculine, squared appearing lower face, then masseter reduction using Botox can be considered. You would be wise to consult an experienced, board certified cosmetic dermatologist. Hope this helps and best of luck.

Fat is usually more visible in the cheeks, jowls, under the chin, and neck. Facial fat tends to be more noticeable in people with rounded and square like, less-pronounced facial features. Buccal fat removal is a surgery to remove the fat in this area of your face or cheek reduction. Contouring with dermal filler. Strategic placement of dermal fillers like Juvederm Volumna and Restylane can produce a face slimming effect. In surgery: Surgical jaw contouring can involve a facelift, neck lift, neck liposuction or adjusting the mandible (jaw bone) by reducing the bone or balancing the bone. Hope this helps.

There are several surgical and nonsurgical procedures that can help narrow the width of the face. Here are a few examples:
Surgical procedures include jaw contouring surgery which reshapes the jawbone to achieve a narrow appearance, cheek reduction surgery which includes buccal fat removal, and chin reduction surgery.
Non-surgical procedures include botox in which one injects botox into the masseter to slim the face by reducing their size, strategic placement of fillers, and neck contouring with energy-based devices.

If you feel your face is too masculine and want some non-surgical options, a good one to start with is masseter Botox to slim the lower part of your face. Fillers to the cheeks and lips can also help before seeking facial feminization surgery (FFS).

My dear, you are 22 y and has the anatomy of a square face, that is very difficult to change with simple procedures, i suggest to consult a plastic surgeon, that can map your face a see what kind of surgery you need to slim the face

First of all, your face does not appear to be masculine whatsoever. It also appears to have normal proportions. I believe you need to come in and see a plastic surgeon like myself in person in order to determine what your concerns and desires are. There are many options available but you need to see which ones suit you better. I hope this helps and good luck from New York City plastic surgery.