27 y Female struggling to eat healthily

So I was an overweight teenager loved all the sweet treats. Wouldn’t say I was fat but was called chubby by people. When I went to uni I got into the gym and had a great social life. Back then I remember eating healthily but also having treats when I wanted to. I was at what I consider my best shape.

Am I totally delusional that it can’t be like that now? So I’m overweight again and for 2 years I’m struggling to get back to a healthy weight again. I stay clean for a few months and stay the same size. I know I need to be consistent for a longer period but this is what I’m struggling with as I see no change even after 2 months 😅

I will say I enjoy doing a lot of stuff outdoors in my free time like hiking, swimming. In winter I do weights at the gym I will admit it is so boring. I know it’s mainly diet and this is what I struggle with. Please give me your tips.

I work in a dead end office job and when I leave I just want to do something fun and I hate being at the gym. Then I spiral because I can’t do something fun and eat instead.