I (21M) am in my first romantic relationship, and I feel overwhelmed today. He (22M) is great and I woke up super insecure about everything.

We've been together about 2 months, but we both connected Memorial day in a different way. Post is in my history of you like reading wants of text, but long story short, we both said we love eachother. I felt amazing until yesterday. I felt low energy around him, but that can be attributed to lack of sleep, up early to go run, and absolutely shitty traffic up to his house. I don't want him to feel I don't enjoy being around him. We smoked weed, and it made me incredibly insecure about everything. Do I really love him? Does he really love me? Am I really in love with a man? Why do I feel like I'm with a stranger? I was fucked. I felt normal and good when I woke up and everything felt normal again. Like everytime we've been together before, but it hit me coming home and I had to console myself. I did a good enough job to get me home, but it's hitting me again, and it feels like I'm drowning in worry, which is based on my own insecurities. I've been rejected my whole life and have never been given the chance to show someone how much love I can give them, and more that is my time to shine, I'm panicking. I feel I'm not experienced enough to know what to do. It's feeling like it's too much and I'm afraid to fail him. He's given me nothing but encouragement and love. Saying I've been better to him in 2 months than his parents have been in his life. I love him and just want to make him happy. I guess I'm just looking for general advice on the situation and start I need to do. Like, I feel I need to talk to him about this funk I'm in. I'll gladly elaborate any details to help you help me.

TL:DR First romantic relationship, and insecurities are rising up and drowning me after we both have come out as saying we love eachother, and I smoked weed with him. General advice needed.