Every relationship is unique, and what may be considered normal or acceptable can vary depending on the individuals involved and their boundaries and expectations. However, I can offer some general insights:
Having numbers of girls his girlfriend doesn't know: It's not inherently wrong to have friends of any gender outside the relationship. However, transparency and open communication are essential in a committed relationship. If a guy has female friends or acquaintances whose numbers his girlfriend doesn't know about, it might lead to feelings of insecurity or suspicion. It's crucial for both partners to feel secure and trusting in the relationship. If there's nothing to hide, it's generally better to be open about friendships and contacts.
Having single female friends his girlfriend doesn't know: Again, having friends of any gender is not necessarily an issue. What matters most is how these friendships are handled within the context of the committed relationship. If the guy is open about his friendships and makes an effort to introduce his girlfriend to them, it can help alleviate any concerns. If the guy keeps these friendships hidden or doesn't want his girlfriend to know about them, it can raise questions about his intentions or trustworthiness.
Sneakiness and trust: You mentioned that it seems sneaky, and in many cases, secrecy can erode trust in a relationship. Trust is the foundation of a healthy and strong partnership, and when one partner feels the other is being secretive or hiding things, it can lead to difficulties in the relationship. It's essential to have open conversations about boundaries and expectations, and both partners should feel comfortable discussing any concerns they have.
Ultimately, the key to a successful relationship is communication and understanding between both partners. If something makes you uncomfortable or feels sneaky, it's important to talk about it with your partner in a non-accusatory and open manner. Each partner can then express their feelings and work together to find a resolution that respects both individuals' needs and boundaries.