Ok, so I met this girl in the gym a while ago, and she is pretty cool. The problem is I rarely met her there - I guess she is not serious about exercising. So the few times I met her - maybe 3 or 4 -, I talked to her, and she was nice. I actually got her phone number, when she told me about her nutrionist, I asked for her number so she could give her nutrionist's number. After that, we chatted up a bit. The other day, she told me she likes smoothies, so I said that we should go get a smoothie at a good place I know before going to the gym someday, and she said yeah. So a couple days later I message her and ask if she wanna do that, but she says she has class that day.

After that I've not seen her again. So it's been 3 or 4 weeks since I last seen her, and I thought about messaging her. Should I? I mean, there's no only other way to talk to her, unless I get lucky and see her in the gym.

p.s.: maybe I wasnt really clear writing this, if you have any doubts, I can clarify