Been in a relationship with her for 2.5 years now and it's been open from the beginning i.e. we both get to fuck around.

I don't contribute more than her to it, I don't buy her stuff, I don't pay bills/rent (we don't live together), I don't 'treat' her. We're both in university so she's not with me because I have a good position/well-paying job.

What is the general consensus of TRP on open relationships? Either we should be completely exclusive and nobody gets to fuck around if we're dating or else I just spin plates and don't commit to anything?
What if I want to be in a relationship but also fuck other girls?

Give me general/specific feedback and opinions.