Im (18M) too attached to my gf (18F)

Me (18M) and my girlfriend (18F) have been together for about half a year. In the beginning she seemed very interested and would enjoy spending time to get to know me. But now that time has passed and we have learned a lot about eachother she is more comfortable with being herself. We used to call every night and now we do activities together everyday after school and I think thats kinda making her feel pressured. Sometimes I want to call her at night but she says she wants her alone time and that we saw eachother today and thats enough. I understand her side of things and really it makes me feel bad for the way that I am because I just love spending time with her by calling her. Shes an avoidant and im an anxious. Has anyone ever been in this type of situation, if so what helped you become less attached and what stopped you from feeling the need to spend so much time with your partner? TLDR: 18M am feeling anxious in my relationship as my girlfriend 18F who's avoidant, wants more alone time. Any advice on how to be less attached and stop needing to spend so much time together?