Ariana Grande had a difficult year in 2018.

The pop star recently reflected on the dissolution of her relationship with Pete Davidson and the death of ex-boyfriend Mac Miller on Instagram, revealing that she was "deep as f--- in my feelings." Grande, 25, wrote that as she was preparing to head out on her third tour, she was feeling "grateful" for her life, "the people in it" and "the ups and challenges."

"mmmmk.... about to embark on my third tour and am for sure deep as f--- in my feelings. and getting my period so..... this is probably gonna be too much," she captioned a black-and-white selfie. "But i just want to say how grateful i am for my life, for the people in it, for the ups and challenges, for the laughter and the pain, for this music and for the lifelong friendships i've made thru making it (that includes my friendships with y'all)."

She continued, "Maaaaaaaan... i can't really fathom all that has happened over the past few years. I don't even really know where i'm going with this post but i'm just grateful to be here still. and excited to see you. i'm prolly gonna cry a lot."

Grande and Davidson ended their relationship in October 2018 after four months. They were engaged to be married at the time. The split came a month after Miller, whom Grande had been in a relationship with prior to the Saturday Night Live star, died a month earlier from an accidental overdose. Speaking on those losses, Grande revealed that she told her team she "wasn't in an okay enough place to tour or work." She credited her friends, fans and music with saving her.

"A few months ago i told my team i wasn't even in an okay enough place to tour or work at all and my friends, you guys and this music really saved my life and turned everything around," she shared. "I'm still healing but i feel a lot lighter as of late and i think this is really going to be such a beautiful time."

Grande added, "Thank god we are doing this. i can't imagine what else i'd do and i want you to know how thankful i am....... anyway. i'm gonna go focus on finishing this show for y'all and put my phone away for a little (how much you wanna bet i don't last a day) so i don't ruin all the surprises. thank you. for everything. i am so deeply and eternally grateful. life is wild. but your love and this music make it feel so sweet. love u."

The "7 Rings" singer hasn't spoken much about the end of her relationship with Davidson or Miller's death. She did speak out amid a mental health crisis involving the comedian, and has shared many tributes to Miller since his passing, but hasn't said much otherwise.