Responses
I think I know what you're talking about, is it "boy meets girl"?
Nah but I found it. It’s Sekainohate De Aimashou but thank you for the answer
https://www.mangago.zone/read-manga/boku_girl/
Probably this one. There's an alien but it's not the love interest.
Need help finding a manga and I barely remember the plot details. It was a gender bender where mc was a guy then turned into girl? Love interest was a blonde guy(alien?). I think at the end mc decided to stay as a woman and they had a kid together.