I (M28) feel unsatisfied by my partner (F26). How do I solve this?

Hello all, I(m28) have been having some issues lately with my partner (f26) regarding intimacy in the bedroom. I believe if i take this chronologically, would make much more sense. So at the beginning of our relationship everything was great. We had regular intercourse (as much as i thought a healthy relationship should have) we did realise we are two busy people and we discussed like how many times are we willing to do it per week and ended up on 3 or 4 times per week.

Time passed, we moved in together (sorry for cutting this part out without any details, but she follows this thread and i want to remain subtle) and when we settled in we were so busy we did not have intercourse in a month. Understandable since we are two busy individuals. But as time passes, i started to initiate it and was rejected every time. It was only after 2 more months that we have had sex once and then 1 time per month at best. Right now we were not intimate for 2 months, almost 3.

I tried to talk to her about this and she always tells me that she isn’t in the mood. Or it’s because she’s on medication (anti depressives). Every time i try to talk to her about it she shrugs and has nothing to say. I tried to communicate to her that i need intimacy every way i could but it always leads to her being cold to me.

In the past two months we do not even cuddle anymore, and i am starting to feel that i am her room mate rather than her lover. She doesn’t even tells me that she loves me anymore without me telling it first.
I tried to be romantic, i got as involved and as supportive as i could. Nothing works.

I love my partner. But this is getting to me and i am getting colder by the day. It’s breaking me. Any advice?