Hmmm confused a lot

So, I've known this guy for a year now, we started dating last April. Him and I grew inseparable and he became my first love.💜 I lost many friends, but gained the best one. Toward the middle of the relationship, I found out he had been lying about things - smaller but still a lie is a lie. Now I have a hard time seeing him as i once did. It's hard falling your first time for someone who lies, your whole outlook on them is always going to be different. But I never give up on someone who makes me smile through my weak days I need advice..