I guess my question is how often should a guy who is really interested text?
About once every 1-2 days. Less than that and he's probably not that interested.
Is he in it just for the sex?
We don't really know.
Am I worried over nothing,
Yes.
and am I texting too much if I text twice a day asking how his day is?
I don't know. This is different for each guy.
I want him to know I'm interested in more but I don't wanna pressure him.
Then text him once each day to show interest.
I have a long time interest in psychology, specializing in relationship dynamics for 30 years.
(Please note, we give the best advice we can based on the information given in a post. For better advice, please include the age of all romantic partners.)