How can you edit someone out of a picture?

I have some really nice pics I took on a vacation with my ex. There are some I'd like to keep because I love how I look in the pic and I really love the places/scenery. But I certainly don't want my ex in them still. Is there any possibility I can just remove the ex's face from these pics? I don't want to damage the entire pic. I'd like to just make it where it looks like it's only me in the picture.

I'd prefer free methods if at all possible. If I had to pay for something, I'd rather it not be much because I just want to do something quick and cheap to hopefully save the good memories from the trip excluding my ex.

I have tried some free apps, but they haven't really worked very well and they have made it hard to really remove the entire other person.

Thanks!

How can you edit someone out of a picture?
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